Seattle flights from boston

Compare flight deals to Seattle from Boston from over 1,000 providers. Then choose the cheapest or fastest plane tickets. Flight tickets to Seattle start from $112 one-way. Flex your dates to find the best BOS–SEA ticket prices.

Direct. from $286. Boston.$287 per passenger.Departing Mon, Apr 29, returning Tue, May 7.Round-trip flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departing from Seattle / Tacoma International on Mon, Apr 29, arriving in Boston Logan International.Inbound direct flight with Alaska Airlines departing from Boston Logan ... The two airlines most popular with KAYAK users for flights from Seattle to Boston are Alaska Airlines and Delta. With an average price for the route of C$ 475 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 323 and an overall rating of 8.0.On average, a flight to Seattle costs $373. The cheapest price found on KAYAK in the last 2 weeks cost $44 and departed from Phoenix Sky Harbor Intl Airport. The most popular routes on KAYAK are Chicago to Seattle which costs $357 on average, and Los Angeles to Seattle, which costs $355 on average. See prices from: Flights from Seattle to Boston via Chicago Midway Ave. Duration 7h 30m When Saturday Estimated price $220 - $700 Flights from Seattle to Providence via Chicago Midway Ave. Duration 7h 15m When Monday to Friday Estimated price $230 - $750 Flights from Seattle to Providence via Baltimore Ave. Duration 12h 10m When Book JetBlue flights and vacation packages to 100+ destinations. Award-winning service, the most legroom in coach, free wi-fi, live TV, movies, snacks, and more. Lowest Fare for Boston to Seattle Flight ₹ 10665- 27 Apr: Today's Lowest Fare ₹ 0: Total flights from Boston to Seattle in a Week : 142 Flights : First Flight: American Airlines, departs at 05:25: Last Flight: JetBlue Airways, Alaska Airlines, departs at 20:25: Non-Stop Flights from Boston to Seattle: 9: Airport Name & codes of Boston & Seattle We offer Round Trip starting at $257 and One-Way flights starting at $129. Find Last Minute Deals on flights from BOS to SEA with Hot Rate Discounts! Save up to 40% on Cheap Flights from Boston (BOS) to Seattle (SEA). The two airlines most popular with KAYAK users for flights from Boston to Rome are Scandinavian Airlines and TAP AIR PORTUGAL. With an average price for the route of $562 and an overall rating of 7.4, Scandinavian Airlines is the most popular choice. TAP AIR PORTUGAL is also a great choice for the route, with an average price of $759 and …

One-way low-fare flights Boston to Seattle.* From. flight_takeoff. To. flight_land. Budget $ Cabin Class. Select travel class. keyboard_arrow_down. From. To. Fare Type. Dates. Price. From Boston (BOS) To Seattle (SEA) One-way | Saver: Depart: May 8, 2024: From. $139* Seen: 9 hours agoCompare flight deals to Seattle from Boston from over 1,000 providers. Then choose the cheapest or fastest plane tickets. Flight tickets to Seattle start from $112 one-way. Flex your dates to find the best BOS–SEA ticket prices.Cheapest round-trip prices found by our users on KAYAK in the last 72 hours. One-way Round-trip. Seattle 2 stops $211. Spokane 1 stop $358. Pasco 1 stop $437. Bellingham 1 stop $506. Pullman 2 stops $757. Wenatchee 2 stops $875. Portland 1 stop $221.Each day, there are between 9 and 14 nonstop flights that take off from Boston and land in Seattle, with an average flight time of 6h 13m. The most common departure time is 19:00 …There are loads of places you can fly direct to from Seattle. The most popular destinations for direct flights among KAYAK users are Los Angeles, Ketchikan, Idaho Falls, Honolulu and St. Louis. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Idaho Falls at $213, while the most expensive was ...

Cheap flights from Boston to Seattle (BOS - SEA) from $89. Round-trip One-way Multi-city. From? To? Tue 4/2. Tue 4/9. 1 adult. Economy. Find Your Flight. The best prices …Check the status of your flight to Boston Logan Airport using the information on our departures page. The data on departures times and status is frequently updated in real time. ... Seattle (SEA) 07:00 am AS459. AA9302. DE5235. JL6357. KE6222. TN2335. Alaska Airlines. American Airlines . Condor . JAL . Korean Air . Air Tahiti Nui . B. …Book cheap flights from Boston to Seattle on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab BOS to SEA flight deals on CheapOair and save big! Hurry, our cheap rates are not going to last forever, so make your bookings ...There are loads of places you can fly direct to from Seattle. The most popular destinations for direct flights among KAYAK users are Los Angeles, Ketchikan, Idaho Falls, Honolulu and St. Louis. On average, the cheapest of these destinations on KAYAK over the last 2 weeks for a return flight was Idaho Falls at $213, while the most expensive was ...

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Each day, there are between 44 and 67 nonstop flights that take off from Boston and land in Washington, D.C., with an average flight time of 1h 42m. The most common departure time is 5:00 pm and most flights take off in the morning, while the most flights land at Washington, D.C. Reagan-National Airport. Each week, there are 433 flights. Seattle/Tacoma, WA to Boston Logan, MA. departing on 11/5. one-way starting at*. $203. Book now. * Restrictions and exclusions apply. Seats and dates are limited. Select markets. 18 travel days available. There are 3 airlines that fly nonstop from Seattle to New York John F Kennedy Intl Airport. They are: Alaska Airlines, Delta and JetBlue. The cheapest price of all airlines flying this route was found with JetBlue at $124 for a one-way flight. On average, the best prices for this route can be found at JetBlue.Lowest Fare for Boston to Seattle Flight ₹ 10665- 27 Apr: Today's Lowest Fare ₹ 0: Total flights from Boston to Seattle in a Week : 142 Flights : First Flight: American Airlines, departs at 05:25: Last Flight: JetBlue Airways, Alaska Airlines, departs at 20:25: Non-Stop Flights from Boston to Seattle: 9: Airport Name & codes of Boston & Seattle The most reliable airlines for Boston to Seattle flights are EL AL, LATAM Airlines, and Condor. They have arrived on schedule on over 96% of recent flights to Seattle. What is best Boston to Seattle flight price on Priceline? Cheap flights from Boston to Seattle start from $128. Anything between $128 and $939 is a good price. Which airlines provide the cheapest flights from Houston to Seattle? The cheapest return flight ticket from Houston to Seattle found by KAYAK users in the last 72 hours was for $119 on Frontier, followed by Spirit Airlines ($157). One-way flight deals have also been found from as low as $75 on Frontier and from $94 on Spirit Airlines.

Economy. See Latest Fare. Boston (BOS) to. Seattle (SEA) 04/29/24 - 05/06/24. from. $251*. Updated: 8 hours ago. Round trip. Flights from Seattle to Boston via Chicago Midway Ave. Duration 7h 30m When Saturday Estimated price $220 - $700 Flights from Seattle to Providence via Chicago Midway Ave. Duration 7h 15m When Monday to Friday Estimated price $230 - $750 Flights from Seattle to Providence via Baltimore Ave. Duration 12h 10m WhenThe two airlines most popular with KAYAK users for flights from Seattle to Boston are Alaska Airlines and Delta. With an average price for the route of C$ 475 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 323 and an overall rating of 8.0. Use Google Flights to explore cheap flights to anywhere. Search destinations and track prices to find and book your next flight. Flights from Seattle to Boston via Chicago Midway Ave. Duration 7h 30m When Saturday Estimated price $220 - $700 Flights from Seattle to Providence via Chicago Midway Ave. Duration 7h 15m When Monday to Friday Estimated price $230 - $750 Flights from Seattle to Providence via Baltimore Ave. Duration 12h 10m WhenCheap Flights from Seattle (SEA) to Boston (BOS) Prices were available within the past 7 days and start at £102 for one-way flights and £203 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. Reserve one-way or return flights from Seattle to Boston with no change fee on selected ...Flight deals from Seattle to Boston Logan International. Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Boston Logan International? Find the … The best one-way flight to Seattle from Boston in the past 72 hours is $125. The best round-trip flight deal from Boston to Seattle found on momondo in the last 72 hours is $217. The fastest flight from Boston to Seattle takes 6h 05m. Direct flights go from Boston to Seattle every day. There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA) Which airlines provide the cheapest flights from Houston to Seattle? The cheapest return flight ticket from Houston to Seattle found by KAYAK users in the last 72 hours was for $119 on Frontier, followed by Spirit Airlines ($157). One-way flight deals have also been found from as low as $75 on Frontier and from $94 on Spirit Airlines.

Flight deals from Seattle to Boston Logan International. Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Boston Logan International? Find the …

The two airlines most popular with KAYAK users for flights from Boston to San Diego are Alaska Airlines and Delta. With an average price for the route of $334 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $373 and an overall rating of 8.0.Mon, May 13 BOS – SEA with Spirit Airlines. 1 stop. from $247. Boston.$253 per passenger.Departing Tue, Apr 30, returning Tue, May 14.Round-trip flight with American Airlines.Outbound indirect flight with American Airlines, departing from Seattle / Tacoma International on Tue, Apr 30, arriving in Boston Logan International.Inbound indirect ... The cheapest month for flights from Boston to Seattle is January, where tickets cost ₹ 18,148 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is ₹ 42,820 and ₹ 41,649 respectively. One-way low-fare flights Boston to Seattle.* From. flight_takeoff. To. flight_land. Budget $ Cabin Class. Select travel class. keyboard_arrow_down. From. To. Fare Type. Dates. Price. From Boston (BOS) To Seattle (SEA) One-way | Saver: Depart: May 8, 2024: From. $139* Seen: 9 hours agoARUBA Get Here This melting-pot island — billed as the happiest in the Caribbean — is also the most visited, with nearly 90 percent of travelers hailing from North America. Fly nonstop from 15 U.S. hubs, as well as Toronto and Montreal. Only Here It looks like a desert — dry, a tad barren, riddled with cacti.Find flights to Seattle from $117. Fly from Boston on American Airlines, Spirit Airlines, JetBlue and more. Search for Seattle flights on KAYAK now to find the best deal. Book Cheap Nonstop & Direct Flights from Boston to Seattle: Search and compare airfares on Tripadvisor to find the best nonstop and direct flights for your trip from Boston to Seattle. Choose the best airline for you by reading reviews and viewing hundreds of ticket rates for non stop and direct flights going to and from your destination. ARUBA Get Here This melting-pot island — billed as the happiest in the Caribbean — is also the most visited, with nearly 90 percent of travelers hailing from North America. Fly nonstop from 15 U.S. hubs, as well as Toronto and Montreal. Only Here It looks like a desert — dry, a tad barren, riddled with cacti.Which airlines provide the cheapest flights from Seattle to Houston? The cheapest return flight ticket from Seattle to Houston found by KAYAK users in the last 72 hours was for $100 on Frontier, followed by Spirit Airlines ($190). One-way flight deals have also been found from as low as $50 on Frontier and from $88 on Spirit Airlines.

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Flights from Sun Country Air traveling this route typically cost $397.79 RT. This price is typically 78% cheaper than other airlines that offer Seattle to Boston flights. When booking this route, the cheapest RT price found was $138.Compare flight deals to Seattle from Boston from over 1,000 providers. Then choose the cheapest or fastest plane tickets. Flight tickets to Seattle start from $112 one-way. Flex your dates to find the best BOS–SEA ticket prices. Boston to Seattle / Tacoma Flights. Flights from BOS to SEA are operated 32 times a week, with an average of 5 flights per day. Departure times vary between 06:30 - 19:59. The earliest flight departs at 06:30, the last flight departs at 19:59. However, this depends on the date you are flying so please check with the full flight schedule above ... Yes, there are multiple flights from Boston to Seattle for under $200. The cheapest flight booked recently is on Spirit Airlines for just $198, but on average you can expect to pay $226. Are there nonstop flights from Boston to Seattle for under $300 on Cheapflights? Cheapflights has at least 20 direct flights from Boston to Seattle under $300. Searching for cheap flights from Seattle to Boston? Enjoy comfort, premium cabin legroom and free movies with Alaska Airlines. Find the lowest fares today. There are 5 airlines that fly nonstop from Chicago to Boston. They are: American Airlines, Delta, JetBlue, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with JetBlue at $73 for a one-way flight. On average, the best prices for this route can be found at JetBlue.Book Cheap Nonstop & Direct Flights from Boston to Seattle: Search and compare airfares on Tripadvisor to find the best nonstop and direct flights for your trip from Boston to Seattle. Choose the best airline for you by reading reviews and viewing hundreds of ticket rates for non stop and direct flights going to and from your destination.The two airlines most popular with KAYAK users for flights from Boston to San Diego are Alaska Airlines and Delta. With an average price for the route of $334 and an overall rating of 8.1, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $373 and an overall rating of 8.0.Cheapest round-trip prices found by our users on KAYAK in the last 72 hours. One-way Round-trip. Seattle 2 stops $211. Spokane 1 stop $358. Pasco 1 stop $437. Bellingham 1 stop $506. Pullman 2 stops $757. Wenatchee 2 stops $875. Portland 1 stop $221.Apr 14, 2024 · If you're flying from Boston Logan International Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 12.1 miles away from the center of Seattle. We've found flights to this airport from $252 . Jan 28, 2024 · Flights from Spirit Airlines typically cost $377.91 RT. The cheapest Spirit Airlines flight found for this route was $138. When traveling from Boston to Seattle on Spirit Airlines, the most popular airport to depart from is Boston Logan Intl Airport and the most popular airport to arrive at is Seattle/Tacoma Intl Airport. Use Google Flights to plan your next trip and find cheap one way or round trip flights from Seattle to Boston. Find the best flights fast, track prices, and book with confidence. ….

Boston to Seattle / Tacoma Flights. Flights from BOS to SEA are operated 32 times a week, with an average of 5 flights per day. Departure times vary between 06:30 - 19:59. The earliest flight departs at 06:30, the last flight departs at 19:59. However, this depends on the date you are flying so please check with the full flight schedule above ... Find flights to Seattle from $120. Fly from Boston on Sun Country Air, American Airlines, Spirit Airlines and more. Search for Seattle flights on KAYAK now to find the best deal.Southwest destinations from Boston with flights in the past. ATL Atlanta. LAST FLIGHT WAS SCHEDULED 2020-01-01 CMH Columbus. LAST FLIGHT WAS SCHEDULED 2020-10-30 FLL Fort Lauderdale. LAST FLIGHT WAS SCHEDULED 2021-04-10 HOU Houston. LAST FLIGHT WAS SCHEDULED 2023-10-01 IND Indianapolis.Seattle/Tacoma, WA to Boston Logan, MA. departing on 11/5. one-way starting at*. $203. Book now. * Restrictions and exclusions apply. Seats and dates are limited. Select markets. 18 travel days available.Cheap flights from Seattle (SEA) to Boston (BOS) Prices were available within the past 7 days and start at CA $164 for one-way flights and CA $296 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. Book one-way or return flights from Seattle to Boston with no change fee on selected ... 08/15/24 - 08/23/24. from. $ 568*. Viewed: 15 hours ago. From. Boston (BOS) To. Seattle (SEA) Roundtrip. Enjoy a complimentary meal and our in-flight entertainment system on Dublin and Shannon connecting transatlantic flights from Boston with Aer Lingus. With three Wi-Fi options to choose from, you can keep in touch while you’re in the sky. Flying from Boston. Boston Logan International Airport (BOS) is located 5 km from city centre in East Find flights to Seattle from $120. Fly from Boston on Sun Country Air, American Airlines, Spirit Airlines and more. Search for Seattle flights on KAYAK now to find the best deal. Seattle flights from boston, Direct flights from Boston to Seattle. All flights from BOS to SEA non-stop. There are direct flights from General Edward Lawrence Logan International, Massachusetts, USA to Seattle Tacoma International (SEA), Washington, USA every day of the week The flight distance is 2502 miles and the trip usually takes about 6 hours and 9 minutes., Moving From Boston To Seattle 🚚 Apr 2024. moving from seattle to spokane, train from boston to seattle, tickets to boston from seattle, flights from boston to seattle, amazon moving from seattle, distance from seattle to boston, moving out of seattle, driving from seattle to boston Dome-shaped signal and fauna, and agencies operate with ..., The best one-way flight to Seattle from Boston in the past 72 hours is $125. The best round-trip flight deal from Boston to Seattle found on momondo in the last 72 hours is $217. The fastest flight from Boston to Seattle takes 6h 05m. Direct flights go from Boston to Seattle every day. There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA), Purchase a flight up to 331 days in advance. You can now purchase flights as far out as 331 days from the date of booking at any time. Our flight schedules will automatically extend day-by-day. Check out our Best Fare Finder to see if we have flights scheduled during your desired dates for a chosen route. See flight availability. , There are 4 airlines that fly nonstop from Boston to Seattle. They are: Alaska Airlines, Delta, Hainan Airlines and JetBlue. The cheapest price of all airlines flying this route was found with JetBlue at $133 for a one-way flight. On average, the best prices for this route can be found at Alaska Airlines., Use Google Flights to explore cheap flights to anywhere. Search destinations and track prices to find and book your next flight. , 2 days ago · Boston Airport has non-stop passenger flights scheduled to 144 destinations in 41 countries. At present, there are 83 domestic flights from Boston. The longest flight from Boston BOS is a 4,942 mile (7,953 km) non-stop route to Hong Kong HKG. , Seattle/Tacoma, WA to Boston Logan, MA. departing on 11/5. one-way starting at*. $203. Book now. * Restrictions and exclusions apply. Seats and dates are limited. Select markets. 18 travel days available., Flights between some cities may be significantly cheaper if you choose a multi-stop airline ticket. Although these connecting flights sacrifice some convenience, on average, travelers save 20%-60% when they choose to fly multi-stop versus a direct flight.. The average price for connecting flights from Seattle to Boston is not available.. The average price for …, Airfares from $125 One Way, $226 Round Trip from Boston to Seattle. Prices starting at $226 for return flights and $125 for one-way flights to Seattle were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply. Mon, May 6 - Tue, May 7., Our data suggests that currently, the cheapest flights from Boston are being offered by American Airlines, Undisclosed Carrier, and Endeavor Airlines. For example, American Airlines flights from Boston to Charlotte, start at $27, Undisclosed Carrier flights from Boston to Washington, D.C. cost around $36, and Endeavor Airlines flights from ..., Departing on Sunday, 5 May 2024 and returning on Tuesday, 7 May 2024. from £112. 23h ago. Cheap flights Spokane - Seattle. Prices refer to lowest available return flight, and are per person for the dates shown. The flights are subject to seat availability as well as variations in the price and tariffs., Looking for a cheap flight? 25% of our users found tickets from Boston to the following destinations at these prices or less: New York $135 one-way - $462 round-trip; Orlando $81 one-way - $163 round-trip; Miami $148 one-way - $316 round-trip. Morning departure is around 7% cheaper than an evening flight, on average*., Flight + hotel deals to Boston, Massachusetts (BOS) Sheraton Boston Hotel. The newly renovated Sheraton Boston Hotel is conveniently located in the heart of Boston's historic Back Bay neighborhood, steps away to over 200 shops and restaurants, including indoor skywalk connections to two premier shopping centers., Find flights to Seattle from $117. Fly from Boston on American Airlines, Spirit Airlines, JetBlue and more. Search for Seattle flights on KAYAK now to find the best deal., Savings not available on all packages. We offer Round Trip starting at $257 and One-Way flights starting at $129. Find Last Minute Deals on flights from BOS to SEA with Hot Rate Discounts! Save up to 40% on Cheap Flights from Boston (BOS) to Seattle (SEA)., Book Cheap Boston to Seattle with United Airlines Flights - offers best deals on Boston to Seattle flight booking. Lowest airfare @Rs 11559., Find flights to Florida from $29. Fly from Boston on Spirit Airlines, Frontier, Allegiant Air and more. Search for Florida flights on KAYAK now to find the best deal., Book Cheap Flights from Seattle to Boston. Looking for flights from Seattle to Boston? Look no more, for you’re at the right place. Book cheap flights from Seattle to Boston on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world., The best one-way flight to Seattle from Boston in the past 72 hours is $125. The best round-trip flight deal from Boston to Seattle found on momondo in the last 72 hours is $217. The fastest flight from Boston to Seattle takes 6h 05m. Direct flights go from Boston to Seattle every day. There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA) , Direct (non-stop) flights from Seattle to Boston All flight schedules from Seattle Tacoma International , Washington , USA to General Edward Lawrence Logan International , Massachusetts , USA. This route is operated by 3 airline(s), and the flight time is 6 hours and 29 minutes. The distance is 2502 miles., Book cheap flights from Boston to Seattle on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab BOS to SEA flight deals on CheapOair and save big! Hurry, our cheap rates are not going to last forever, so make your bookings ..., There are 4 airlines that fly nonstop from Boston to Seattle. They are: Alaska Airlines, Delta, Hainan Airlines and JetBlue. The cheapest price of all airlines flying this route was found with JetBlue at $132 for a one-way flight. On average, the best prices for this route can be found at Alaska Airlines., Cheap Flights from Boston to North Seattle (BOS-SEA) Prices were available within the past 7 days and start at $91 for one-way flights and $181 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals. , Purchase a flight up to 331 days in advance. You can now purchase flights as far out as 331 days from the date of booking at any time. Our flight schedules will automatically extend day-by-day. Check out our Best Fare Finder to see if we have flights scheduled during your desired dates for a chosen route. See flight availability., Flight deals from Seattle to Boston Logan International. Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Boston Logan International? Find the …, Flights from Boston to Seattle with American Airlines. Round trip. 1 Adult, Economy class. Book with cash. From. To. Depart. 04/26/24. today. Return. 05/03/24. today. Home. …, Check the status of your flight to Boston Logan Airport using the information on our departures page. The data on departures times and status is frequently updated in real time. ... Seattle (SEA) 07:00 am AS459. AA9302. DE5235. JL6357. KE6222. TN2335. Alaska Airlines. American Airlines . Condor . JAL . Korean Air . Air Tahiti Nui . B. …, Cheap flights from Seattle to Boston (SEA - BOS): Compare last minute flight deals, direct flights and round-trip flights with Orbitz today! Skip to main content. ... Prices starting at $245 for return flights and $101 for one-way flights to Boston were the cheapest prices found within the past 7 days, for the period specified., Find flights to Boston from $96. Fly from Seattle on Sun Country Air, Spirit Airlines, Delta and more. Search for Boston flights on KAYAK now to find the best deal., Between Boston and Seattle, the maximum delay was 2h 15m. Every week, there is on average 81 flights between Boston and Seattle. It is on average $208.46 for a 2 stop (s) flight between Boston and Seattle. On average, it is $256.28 for a direct flight between Boston and Seattle. Boston is 7% more expensive than Seattle., AS349 and Boston BOS to Seattle SEA Flights. Flight AS349 is code-shared by 4 airlines using the flight numbers AA9369, DE5065, JL6357, TN2336. Other flights departing from Boston BOS: B6167, DL5670, AA2600, DL627. Other flights arriving at Seattle SEA: UA1986, WN4275, WN4269, AS2185. All flights connecting Boston BOS to Seattle SEA., Return flights from Seattle SEA to Boston BOS with United If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $620 to $620, it’s easy to find a flight that suits your budget.