BOS - SEA

Find Cheap Flights from Boston to Seattle

1 adult
1 adult, Economy

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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Booking Insights
Flights Deals

Cheap Flights from Boston to Seattle (BOS-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Boston to Seattle

American Airlines Logo
BOS-SEA
6h 23mdirect
American Airlines Logo
SEA-BOS
5h 37mdirect
American Airlines
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Condor Logo
BOS-SEA
6h 35mdirect
Condor Logo
SEA-BOS
5h 17mdirect
Condor
Find Deal
KLM Logo
BOS-SEA
6h 38mdirect
KLM Logo
SEA-BOS
5h 34mdirect
Qatar Airways Logo
BOS-SEA
6h 35mdirect
Qatar Airways Logo
SEA-BOS
5h 37mdirect
Qatar Airways
Find Deal
Japan Airlines Logo
BOS-SEA
6h 35mdirect
Japan Airlines Logo
SEA-BOS
5h 24mdirect
Japan Airlines
Find Deal
Aer Lingus Logo
BOS-SEA
6h 30mdirect
Aer Lingus Logo
SEA-BOS
5h 35mdirect
Aer Lingus
Find Deal
Air France Logo
BOS-SEA
6h 38mdirect
Air France Logo
SEA-BOS
5h 30mdirect
Air France
Find Deal
Delta Logo
BOS-SEA
6h 40mdirect
Delta Logo
SEA-BOS
5h 34mdirect
EL AL Logo
BOS-SEA
6h 19mdirect
EL AL Logo
SEA-BOS
5h 34mdirect
Alaska Airlines Logo
BOS-SEA
6h 35mdirect
Alaska Airlines Logo
SEA-BOS
5h 37mdirect
Alaska Airlines
Find Deal
JetBlue Logo
BOS-SEA
6h 20mdirect
JetBlue Logo
SEA-BOS
5h 35mdirect
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 34mdirect
Scandinavian Airlines
Find Deal
Hawaiian Airlines Logo
BOS-SEA
6h 19mdirect
Hawaiian Airlines Logo
SEA-BOS
5h 37mdirect
Hawaiian Airlines
Find Deal
Korean Air Logo
BOS-SEA
6h 40mdirect
Korean Air Logo
SEA-BOS
5h 24mdirect
Korean Air
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Air Tahiti Nui Logo
BOS-SEA
6h 35mdirect
Air Tahiti Nui Logo
SEA-BOS
5h 37mdirect
Air Tahiti Nui
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TAP AIR PORTUGAL Logo
BOS-SEA
6h 19mdirect
TAP AIR PORTUGAL Logo
SEA-BOS
5h 35mdirect
TAP AIR PORTUGAL
Find Deal
Virgin Atlantic Logo
BOS-SEA
6h 40mdirect
Virgin Atlantic Logo
SEA-BOS
5h 34mdirect
Virgin Atlantic
Find Deal
Singapore Airlines Logo
BOS-SEA
6h 23mdirect
Singapore Airlines Logo
SEA-BOS
5h 19mdirect
Singapore Airlines
Find Deal
Booking Insights

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 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 £177 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is £350 and £333 respectively.

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

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £292 on average.

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 3 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.


Good to know - Cheap tickets from Boston to Seattle

Low seasonJanuary
Best time to beat the crowds (32% less expensive on average)
Most popular time to fly (35% 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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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.
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.

FAQs for booking flights from Boston to Seattle

  • Are there onsite hotels at Seattle-Tacoma International Airport?

    While there are no hotels located onsite at Seattle-Tacoma International Airport, there is a cluster of hotels just shy of a mile away from the airport’s terminals. Hilton Seattle Airport & Conference Center, Crowne Plaza Seattle Airport, and Seattle Airport Marriott all are within a mile of the airport and offer free airport pickup and drop-off.

  • Can I fly from Boston to Seattle non-stop?

    Alaska Airlines, jetBlue Airways, and Delta Air Lines all offer nonstop flights from Boston to Seattle. One-stop flights are also common between the two cities, with flights offered by airlines such as United Airlines, Delta Air Lines, and American Airlines. Common layover cities for such flights include Washington D.C., Detroit, and Philadelphia.

  • What is the quickest way from Seattle-Tacoma International Airport to downtown Seattle?

    If you are not renting or driving a vehicle, Link Light Rail is the quickest way to get from the airport to downtown Seattle. Link Light Rail trains connect Seattle-Tacoma International Airport directly to downtown Seattle, and they even run all the way north up to the University of Washington. The airport’s Link station is found on the fourth floor of the adjacent parking garage.

  • What facilities are available for children in Seattle-Tacoma International Airport and Boston Logan International Airport?

    Seattle-Tacoma International Airport and Boston Logan International Airport both have children’s play areas available. Seattle-Tacoma International Airport’s children’s play area, the Playroom, is located across from the Seattle Tap Room by the A gates in the Central Terminal. Boston Logan International Airport’s three children’s play areas are located by Gate 18 in Terminal A, Gate 30 in Terminal B, and Gate 25 in Terminal C.

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

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

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

    The Boeing 737 MAX 9 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 return 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 family-friendly diversion during your time at Boston Logan International Airport? A good option for art-loving families is Logan International’s Airport Public Art Program. The program features a variety of temporary exhibits that aim to enliven the airport’s environment while simultaneously educating the public.
  • For travelers flying with their four-legged companions on their flights from Boston to Seattle, you will be happy to hear that both airports have pet relief areas available. Boston Logan International Airport’s pet relief areas are located by the Arrivals area outside of the terminals as well as in Terminal E. In Seattle-Tacoma International Airport there are five pet relief areas: two outside of Baggage Claim and the three others by the N, S, and B Gates.
  • Boston Logan International Airport has plenty to offer in terms of dining that offers a bit of local flare. The Harpoon Tap Room, for instance, is a branch of Boston’s Harpoon Brewery and serves a variety of local brews along with a variety of barroom classics. Another local option is Dine Boston. Dine Boston offers a seasonal menu that is updated regularly by guest chefs from the Boston gastronomical scene.
  • For travelers picking up a rental car upon arriving at Seattle-Tacoma International Airport, the airport’s rental car facilities are found in a separate building that is accessible by 24/7 shuttle buses. The shuttle buses pick up from outside of Baggage Claim on both the north and south side of the terminal.
  • Traveling from the suburbs to Boston Logan International Airport? One easy option is to hop on the Logan Express instead of renting a car. The Logan Express features stops in many of Boston’s suburbs such as Framingham, Back Bay, and Woburn.

Prefer to fly direct from Boston to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Boston Logan Intl to Seattle/Tacoma Intl.
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

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

Tuesday

Aer Lingus, Air France, Air Tahiti Nui, +13 more

Aer Lingus, Air France, +14 more

Wednesday

Aer Lingus, Air France, Air Tahiti Nui, +15 more

Aer Lingus, Air France, +16 more

Thursday

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

Friday

Aer Lingus, Air France, Air Tahiti Nui, +14 more

Aer Lingus, Air France, +15 more

Saturday

Aer Lingus, Air France, Air Tahiti Nui, +14 more

Aer Lingus, Air France, +15 more

Sunday

Aer Lingus, Air France, Air Tahiti Nui, +16 more

Aer Lingus, Air France, +17 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to Boston Logan Intl

Monday

Air France, Air Tahiti Nui, Alaska Airlines, +12 more

Air France, Air Tahiti Nui, +13 more

Tuesday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

Wednesday

Aer Lingus, Air France, Air Tahiti Nui, +13 more

Aer Lingus, Air France, +14 more

Thursday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

Friday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

Saturday

Aer Lingus, Air France, Air Tahiti Nui, +15 more

Aer Lingus, Air France, +16 more

Sunday

Air France, Air Tahiti Nui, Alaska Airlines, +13 more

Air France, Air Tahiti Nui, +14 more

See more direct flights

Reviews of the 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 10000 reviews
8.1Boarding
8.5Crew
7.1Food
7.8Comfort
7.1Entertainment
Airline reviews

Very nice as always. Not that it’s anyone’s fault really but for some reason the seat (16C) was really hard…. Not typical for your planes… dunno what or why… maybe it was just me ?, The flight was great otherwise

10.0 ExcellentLee, Jul 2025ORD - SEA
Read more Alaska Airlines reviews

Very nice as always. Not that it’s anyone’s fault really but for some reason the seat (16C) was really hard…. Not typical for your planes… dunno what or why… maybe it was just me ?, The flight was great otherwise

My experience was great with Alaska Airlines. They were very helpful when I was checking in. The flight crew was very helpful with our needs.

Crew members were friendly, but I wouldn’t use “entertaining” to describe them. Exact step by step instructions on getting wi-fi on the phone would be helpful.

Ease of reservations, confirmation. Cramped seating, very, very uncomfortable! Claustrophobic.

My husband unfortunately had a very large lady next to him who did not fit in the seat and had to have the armrest up so she was partially in his seat and she also had horrible BO

I liked the legroom even in row 26! I fell asleep immediately and slept the whole flight.

delayed flight 3 hours, then took 45 min to get to gate and another 10 min to open door

The plane was put out of service and had to wait for a new plane to be assigned. No one had any information and the information on the screens was never updated. The call wait time was 2 hours and the estimated time for text assistance was 55 minutes which was a lie because after 55 minutes nothing happened. I understand that delays happen but to not have anyone available to provide any update or reassurance was just negligent. Also, what is the point of having an 800 number if no one answers it and don’t get me started on the text message system. Ridiculous!

Very good; ohana atmosphere and taking care of customer care

Flight was delayed an hour, so that was inconvenient. But they tried to make it up in the air, which I appreciated. Crew was very nice, service was excellent. Description of food didn’t quite match what was served, but it was tasty. 👍🏽

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

Information on your arrival and departure airports

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