BOS - SEA

Find cheap flights from Boston to Seattle

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KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Seattle, as well as popular online travel agencies
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Flights Deals
Expert advice
Useful Info
Flights Deals

Cheap Flight Deals from Boston to Seattle (BOS-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Boston to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from Boston to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
American Airlines Logo
BOS-SEA
6h 23mdirect
American Airlines Logo
SEA-BOS
5h 37mdirect
American Airlines
Find Deal
Condor Logo
BOS-SEA
6h 13mdirect
Condor Logo
SEA-BOS
5h 20mdirect
Condor
Find Deal
Qatar Airways Logo
BOS-SEA
6h 13mdirect
Qatar Airways Logo
SEA-BOS
5h 37mdirect
Qatar Airways
Find Deal
Japan Airlines Logo
BOS-SEA
6h 13mdirect
Japan Airlines Logo
SEA-BOS
5h 24mdirect
Japan Airlines
Find Deal
Aer Lingus Logo
BOS-SEA
6h 30mdirect
Aer Lingus Logo
SEA-BOS
5h 27mdirect
Aer Lingus
Find Deal
Air France Logo
BOS-SEA
6h 23mdirect
Air France Logo
SEA-BOS
5h 34mdirect
Air France
Find Deal
Delta Logo
BOS-SEA
6h 40mdirect
Delta Logo
SEA-BOS
5h 39mdirect
EL AL Logo
BOS-SEA
6h 20mdirect
EL AL Logo
SEA-BOS
5h 39mdirect
Alaska Airlines Logo
BOS-SEA
6h 13mdirect
Alaska Airlines Logo
SEA-BOS
5h 37mdirect
Alaska Airlines
Find Deal
JetBlue Logo
BOS-SEA
6h 18mdirect
JetBlue Logo
SEA-BOS
5h 31mdirect
JetBlue
Find Deal
LATAM Airlines Logo
BOS-SEA
6h 31mdirect
LATAM Airlines Logo
SEA-BOS
5h 34mdirect
LATAM Airlines
Find Deal
Scandinavian Airlines Logo
BOS-SEA
6h 38mdirect
Scandinavian Airlines Logo
SEA-BOS
5h 39mdirect
Scandinavian Airlines
Find Deal
Hawaiian Airlines Logo
BOS-SEA
6h 20mdirect
Hawaiian Airlines Logo
SEA-BOS
5h 37mdirect
Hawaiian Airlines
Find Deal
Korean Air Logo
BOS-SEA
6h 23mdirect
Korean Air Logo
SEA-BOS
5h 34mdirect
Korean Air
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Air Tahiti Nui Logo
BOS-SEA
6h 13mdirect
Air Tahiti Nui Logo
SEA-BOS
5h 37mdirect
Air Tahiti Nui
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TAP AIR PORTUGAL Logo
BOS-SEA
6h 18mdirect
TAP AIR PORTUGAL Logo
SEA-BOS
5h 31mdirect
TAP AIR PORTUGAL
Find Deal
Virgin Atlantic Logo
BOS-SEA
6h 40mdirect
Virgin Atlantic Logo
SEA-BOS
5h 39mdirect
Virgin Atlantic
Find Deal
Singapore Airlines Logo
BOS-SEA
6h 23mdirect
Singapore Airlines Logo
SEA-BOS
5h 27mdirect
Singapore Airlines
Find Deal
British Airways Logo
BOS-SEA
6h 30mdirect
British Airways Logo
SEA-BOS
5h 31mdirect
British Airways
Find Deal
Expert advice

Expert advice for your flight from Boston to Seattle

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are specific to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
JetBlue

JetBlue’s Blue Extra fare includes priority check-in and early boarding for added convenience.


JetBlue offers free gate-to-gate Wi-Fi and live TV channels for all passengers.

Read more about JetBlueby Harriet Baskas
Delta

Delta’s Comfort Plus offers 8 cm extra legroom for a more comfortable journey.


Delta offers free Wi-Fi for SkyMiles members on domestic flights, enhancing connectivity.

Read more about Deltaby Stefanie Waldek
Alaska Airlines

Alaska Airlines offers a 20-minute baggage guarantee, ensuring quick baggage claim or bonus miles.


First Class includes priority boarding and two free checked bags, enhancing travel convenience.

Airports
BOS

Download the FlyLogan app for gate info, flight status, and order ahead options at BOS restaurants.

Read more about BOSby Blane Bachelor
SEA

Use the Link light rail for a cost-effective 40-minute trip from SEA to downtown Seattle.

Read more about SEAby Harriet Baskas
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on JetBlue, Alaska Airlines and SEA

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Blane Bachelor

Blane Bachelor

Expert on BOS

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Useful Info

KAYAK's insights & trends for Boston to Seattle flights

Get data-powered insights and trends into flights from Boston to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to Seattle?

The average price of all round-trip flights from Boston to Seattle clicked on KAYAK for each day over the last 12 months.

For Boston to Seattle, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Seattle back to Boston, the best deals are generally found on Wednesday, with Monday being the most expensive.

What is the cheapest month to fly from Boston to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to Seattle is January, where tickets cost C$ 327 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is C$ 728 and C$ 716 respectively.

Can I save money by flying with a layover from Boston to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of C$ 347, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Boston to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boston to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boston to Seattle, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.


Good to know

Low seasonJanuary
High seasonAugust
Best time to beat the crowds (36% less expensive on average)
Most popular time to fly (42% more expensive on average)

When to book flights from Boston to Seattle

Are your dates flexible? Find out the best times to travel from Boston to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Flights from Boston to Seattle: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Boston to Seattle 
Verified travelerFlew with Alaska AirlinesBOS-SEAOct 2024
Flying Alaska Airlines from Boston to Seattle was an example of getting exactly what you expect. A no-frills basic experience, but one where the important things were accomplished, timely departure, on-time arrival, no drama, no glitches, completely as anticipated. I paid a little extra for one offered perk (seat selection), and I'm glad I did because my early morning flight was full. Next time, I'll likely pre-order a snack, since they looked good, were served promptly, and are priced right.
Verified travelerFlew with Alaska AirlinesBOS-SEASep 2024
I've always had my best luck with Delta and will stick with them in the future.
CarlaFlew with Alaska AirlinesBOS-SEAMay 2024
It’s a good choice. Seattle airport is huge and confusing if you are changing planes. Have plenty of time to switch.
GFlew with Alaska AirlinesBOS-SEAApr 2024
Would have liked to have more information on getting to my rental car off site It wasn't hard, but it would have taken less time and less wandering if it had been more clear
DavidFlew with Alaska AirlinesBOS-SEAFeb 2024
Not enough trips from Boston to Seattle to judge… flight times and boarding process were very positive.

FAQs for booking flights from Boston to Seattle

  • Which airlines offer Wi-Fi service onboard planes from Boston to Seattle?

    All the following airlines offer inflight Wi-Fi service on the Boston to Seattle flight route: JetBlue, Alaska Airlines, Hawaiian Airlines, American Airlines, Delta, and Japan Airlines.

  • Which aircraft models fly most regularly from Boston to Seattle?

    The Airbus A321neo is the aircraft model that flies most regularly on the Boston to Seattle flight route.

  • Which airline alliances offer flights from Boston to Seattle?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Boston and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Boston to Seattle?

    There are direct flights from Boston to Seattle on a daily basis.

  • How does KAYAK find such low prices on flights from Boston to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Boston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Boston to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 193 or less one-way.

Prefer to fly direct from Boston to Seattle?

Find which airlines fly direct from Boston Logan Intl Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Boston Logan Intl to Seattle/Tacoma Intl

Monday

Air France,Air Tahiti Nui,Alaska Airlines, +18 more

Air France,Air Tahiti Nui, +19 more

Tuesday

Air France,Air Tahiti Nui,Alaska Airlines, +16 more

Air France,Air Tahiti Nui, +17 more

Wednesday

Air France,Air Tahiti Nui,Alaska Airlines, +17 more

Air France,Air Tahiti Nui, +18 more

Thursday

Air France,Air Tahiti Nui,Alaska Airlines, +19 more

Air France,Air Tahiti Nui, +20 more

Friday

Air France,Air Tahiti Nui,Alaska Airlines, +15 more

Air France,Air Tahiti Nui, +16 more

Saturday

Air France,Air Tahiti Nui,Alaska Airlines, +16 more

Air France,Air Tahiti Nui, +17 more

Sunday

Air France,Air Tahiti Nui,Alaska Airlines, +18 more

Air France,Air Tahiti Nui, +19 more

See more nonstop flights

Direct returns

Seattle/Tacoma Intl to Boston Logan Intl

Monday

Air France,Air Tahiti Nui,Alaska Airlines, +15 more

Air France,Air Tahiti Nui, +16 more

Tuesday

Air France,Air Tahiti Nui,Alaska Airlines, +16 more

Air France,Air Tahiti Nui, +17 more

Wednesday

Air France,Air Tahiti Nui,Alaska Airlines, +15 more

Air France,Air Tahiti Nui, +16 more

Thursday

Air France,Air Tahiti Nui,Alaska Airlines, +16 more

Air France,Air Tahiti Nui, +17 more

Friday

Air France,Air Tahiti Nui,Alaska Airlines, +16 more

Air France,Air Tahiti Nui, +17 more

Saturday

Air France,Air Tahiti Nui,Alaska Airlines, +17 more

Air France,Air Tahiti Nui, +18 more

Sunday

Air France,Air Tahiti Nui,Alaska Airlines, +16 more

Air France,Air Tahiti Nui, +17 more

See more nonstop flights
See more nonstop flights

Top airline flying from Boston to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Boston to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9968 reviews
7.1Entertainment
8.2Boarding
7.1Food
7.9Comfort
8.5Crew
Airline reviews

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

4.0 OkayAnonymous, Apr 2025EWR - SEA
Read more Alaska Airlines reviews

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

It was all great all around. Will travel with Alaska next trip.

There was no seating at the gate, no where to charge your devices, super crowded. Boarding in group F meant all luggage space was taken when it was time for me to board. The boarding crew was short with everyone and seemed irritated. The luggage space was insufficient, the seat was too small for me (6'4") and very uncomfortable trip. I was in a middle seat between a person snoring the whole trip and a person with very strong body odor. The flight crew was terse and unfriendly, seemed irritated and impatient. Yelled a lot at people with earbuds in, understandable. Finally, we arrived 10 minutes early, only to sit on the tarmac for 20 minutes and wait for a gate. Worst flight experience I've had in years.

Flight 351 SEA to BOI was terrible. We got to cruising altitude and I needed to use the restroom but the fasten seatbelt sign never came off. There was no turbulence and I'd felt the plane level off so I stood up to use the restroom about 15 minutes after we leveled off. The stewardess went over the intercom and said I needed to be seated because the captain hadn't turned off the fasten seatbelt sign....Which... Fair.... But not five minutes later she went and used the bathroom. Felt very unprofessional to leave a paying customer with a burning urethra for the entire flight and bark at them to sit down and still use the bathroom yourself. They never did turn off the seatbelt sign.

For longer trips, snacks are puny, boring and don’t have ANY nutritional value.

Upgraded to first class both times .The flight attendant Spicy Tim.was excellent and very amusing.

Close boarding too early we’re willing to not let people on flight that could not check in. What ever happened to customer service? Three of us had to fight to get on plane shameful

Made us check our carry on,even though there was plenty of room because they didn't check with the flight crew. Also boarding was 40min late, due to the plane being on the wrong side of the airport. Also their app didn't record my tsa precheck

The flight was delayed due to a safety check. Why couldn't that have been done ahead of time? We got to Seattle with enough time to make our connecting flight but they kept changing the gate so we missed it. There were at least ten of us who missed the flight. The airline was aware. They could have waited. They didn't. Our new flight was not for seven hours and then was delayed another two hours. We got the last seats which don't recline. Super uncomfortable after a long day spent at the worst airport. Did they offer us a meal voucher or anything? On top of that Alaska Airlines didn't complete my ticket to the new flight. I wasn't sure I would get on this horrible flight, either. Oh, and it's ten o'clock at night....no food. Is this how Alaska Airlines treats its customers? I'll never fly with this airline again.

It was very comfortable. Personal entertainment screens would, of course, have been nice. And the flight in Seattle was delayed, but... things happen. All in all, I like Alaska Airlines very much.

Everything you need to know for your flight from Boston to Seattle

Information on your arrival and departure airports

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