SEA - BOS

C$ 141 Find Cheap Flights from Seattle to Boston

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Boston departing on 13/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Search hundreds of travel sites at once for deals on flights to Boston

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Boston, 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 Seattle to Boston, as well as popular online travel agencies
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Cheap Flight Deals from Seattle/Tacoma Intl to Logan Intl (SEA-BOS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle/Tacoma Intl to Logan Intl 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 Seattle to Boston

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Seattle to Boston.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
10:29 p.m. - 6:55 a.m.SEA-BOS
5h 26mdirect
7:05 p.m. - 10:25 p.m.BOS-SEA
6h 20mdirect
C$ 284Delta
Find Deal
Mon, 3 Feb - Thu, 6 Feb
11:48 p.m. - 8:03 a.m.SEA-BOS
5h 15mdirect
7:17 p.m. - 10:38 p.m.BOS-SEA
6h 21mdirect
C$ 311JetBlue
Find Deal
Sun, 16 Feb - Tue, 18 Feb
11:48 p.m. - 8:03 a.m.SEA-BOS
5h 15mdirect
7:19 p.m. - 10:38 p.m.BOS-SEA
6h 19mdirect
C$ 312JetBlue
Find Deal
Mon, 24 Feb - Mon, 3 Mar
3:45 p.m. - 11:59 p.m.SEA-BOS
5h 14mdirect
5:24 p.m. - 9:30 a.m.BOS-SEA
19h 06m1 stop
C$ 327Alaska Airlines
Find Deal
Fri, 7 Feb - Tue, 11 Feb
3:45 p.m. - 11:59 p.m.SEA-BOS
5h 14mdirect
4:30 p.m. - 12:44 p.m.BOS-SEA
23h 14m1 stop
C$ 346Alaska Airlines
Find Deal
Fri, 7 Feb - Mon, 10 Feb
10:29 p.m. - 6:55 a.m.SEA-BOS
5h 26mdirect
7:05 p.m. - 10:25 p.m.BOS-SEA
6h 20mdirect
C$ 356Delta
Find Deal
Mon, 24 Feb - Fri, 7 Mar
7:08 a.m. - 6:26 p.m.SEA-BOS
8h 18m1 stop
5:45 a.m. - 1:22 p.m.BOS-SEA
10h 37m2 stops
C$ 377United Airlines
Find Deal
Sun, 2 Feb - Sun, 9 Feb
5:00 a.m. - 6:26 p.m.SEA-BOS
10h 26m2 stops
4:09 p.m. - 10:17 p.m.BOS-SEA
9h 08m1 stop
C$ 409United Airlines
Find Deal
Sat, 1 Feb - Mon, 3 Mar
9:05 a.m. - 7:00 p.m.SEA-BOS
6h 55m1 stop
7:20 a.m. - 6:10 p.m.BOS-SEA
13h 50m2 stops
C$ 464Southwest
Find Deal
Thu, 13 Feb - Tue, 18 Feb
10:00 a.m. - 11:35 p.m.SEA-BOS
10h 35m1 stop
6:55 a.m. - 5:50 p.m.BOS-SEA
13h 55m2 stops
C$ 478Southwest
Find Deal
Mon, 3 Feb - Sun, 9 Feb

Flights from Seattle to Boston - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to Boston 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 Seattle to Boston?

The average price of all round-trip flights from Seattle to Boston clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Boston on a Sunday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Seattle to Boston. For your return ticket, we recommend flying on a Monday and avoiding Thursdays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Boston, 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 Seattle to Boston is January, where tickets cost C$ 312 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is C$ 779 and C$ 736 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Boston, 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 Seattle to Boston, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low season

January

High season

August

Cheapest flight

C$ 141
Best time to beat the crowds (43% less expensive on average)
Most popular time to fly (29% more expensive on average)
Flight from Seattle to Boston

When to book flights from Seattle to Boston

Are your dates flexible? Find out the best times to travel from Seattle to Boston 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.

FAQs for booking flights from Seattle to Boston

  • Where can I find bus services at Logan airport?

    Moving around the Logan airport is the least of your worries since the airport provides free bus services. They ferry travelers to various spots at varying intervals. The buses are easy to board and to load luggage, thanks to their low floors. They also have a wheelchair lift, making them friendly to the disabled. You’ll find them to the south of each terminal.

  • What assistance can I get at the Seattle airport?

    The airport works toward giving travelers a memorable experience when waiting for their flights. You can find advanced facilities and welcoming staff to help you move around and offer you all the assistance needed. The disabled can access wheelchair services, which the airport provides at no cost upon making a reservation.

  • How fast can I get accommodation upon landing at Logan airport?

    You can get accommodation near Logan airport for approximately $144. Take a free shuttle bus at the terminals to access hotels such as the Homewood Suites, located 3.5 miles away. Enjoy an indoor pool table, Wi-Fi, and a fitness center. The hotel serves complimentary breakfast too.

  • What can keep me busy as I wait for my flight to Seattle Airport?

    Travelers can enjoy a walking tour to explore attractions in the neighborhood using underground paths and learn about the history. Waiting for your flight does not have to be boring, as there is too much fun around the airport.

  • What is the cheapest flight from Seattle to Boston?

    In the last 3 days, the lowest price for a flight from Seattle to Boston was C$ 98 for a one-way ticket and C$ 197 for a round-trip.

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

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

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

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

  • Which airline alliances offer flights from Seattle to Boston?

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

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

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

  • Which is the best airline for flights from Seattle to Boston, Alaska Airlines or Delta?

    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$ 541 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 383 and an overall rating of 8.0.

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

    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 Seattle to Boston.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boston from Seattle 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 Seattle to Boston?

    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 Boston with an airline and back to Seattle with another airline.

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

    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 Boston from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

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

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 120 or less one-way and C$ 480 or less round-trip.
  • Seattle International Airport offers tranquil air services to travelers flying to Boston. You can book one among the several nonstop flights and land at Logan International Airport. Airlines operating on this route include Alaska and American Airlines.
  • If you are departing from Seattle airport, you can park your car and fly with your keys. You’ll find dedicated staff to assist you in parking and even carry your bags to the airport. What more, you enjoy a complimentary bottle of water as you head to the terminals.
  • While at Seattle airport, you can enjoy free Wi-Fi and take snacks and drinks at the elegant lounges that the facility has to offer. You can book your lounge tickets that cost around $49. At Courtyard A, you’ll find the Club Sea lounge that serves beer and other beverages.
  • Seattle airport features multiple artistic works that include photography, sculpture, and painting, among others. Travelers can explore creative artwork by reputable artists such as Robert Rauschenberg.
  • Travelers enjoy a variety of dining services as they wait to depart from Seattle International Airport. There are gift shops, fashion brands, and duty-free services offered at the waiting halls.
  • For those travelers with young kids, Seattle airport provides nursing rooms located in various areas. Find one in the Children Play Area at Concourse A. Another nursing room exists in Concourse D next to D24. You’ll also find one above checkpoint 3.
  • Travelers landing at Logan International Airport can access the United Club lounge located in Terminal B at $59 for adults. The lounge serves drinks, premium food, snacks, and breakfast. Other services include printing, photocopies, and free Wi-Fi.
See more tips

Prefer to fly direct from Seattle to Boston?

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

Direct departures

Seattle/Tacoma Intl to Boston Logan Intl

Monday

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

Aer Lingus,Air France, +16 more

Tuesday

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

Aer Lingus,Air France, +16 more

Wednesday

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

Aer Lingus,Air France, +14 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, +17 more

Aer Lingus,Air France, +18 more

Sunday

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

Aer Lingus,Air France, +17 more

See more nonstop flights

Direct returns

Boston Logan Intl to Seattle/Tacoma Intl

Monday

Aer Lingus,Air France,Air Tahiti Nui, +19 more

Aer Lingus,Air France, +20 more

Tuesday

Aer Lingus,Air France,Air Tahiti Nui, +17 more

Aer Lingus,Air France, +18 more

Wednesday

Aer Lingus,Air France,Air Tahiti Nui, +17 more

Aer Lingus,Air France, +18 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, +16 more

Aer Lingus,Air France, +17 more

Saturday

Aer Lingus,Air France,Air Tahiti Nui, +17 more

Aer Lingus,Air France, +18 more

Sunday

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

Aer Lingus,Air France, +16 more

See more nonstop flights
See more nonstop flights

Top 3 airlines serving from Seattle to Boston

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Boston. 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 Seattle to Boston? 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 9706 reviews
7.9Comfort
7.1Food
8.2Boarding
7.1Entertainment
8.5Crew
Airline reviews

Crew was great, flight was uneventful (which is what you want!), would like media in the seat backs in all airplanes ..but all in all it was a good flight experience.

10.0 ExcellentAnonymous, Jan 2025SEA - IAD
Read more Alaska Airlines reviews

Crew was great, flight was uneventful (which is what you want!), would like media in the seat backs in all airplanes ..but all in all it was a good flight experience.

Unfortunately, an issue occurred where a delay impeded me from making my connection in LA. I couldn't get a flight home until 10 hours after my originally scheduled flight. Once I finally made it to DFW for my connecting flight, my next flight was delayed. I was supposed to be home on 12/23 at 9:00 p.m. I didn't make it home until 12/24 at 11:00 a.m. I was given the choice to either take a flight the next day or the flight that way 10 hours later. I wasn't given an option for a hotel if I stayed overnight. I was also denied the ability to go to the Alaska Lounge due to the delay. It was a very uncomfortable experience. The only seat I was able to get on the next flight was in a row where the seats couldn't recline. After an extended wait at the airport, this was very frustrating!

We don't have food or entertainment on this flight. We were late boarding but then arrived in Yakima early. Kayak sent me a delay notice but we weren't delayed.

I paid $49 to select my seat---6A a window seat just behind first class. When I started to get on the plane I was told that my seat had been given to someone else and I now had a middle seat. They finally gave me an aisle seat. When I told them I wanted my $49 back, I was told I would need to call alaska and fight with them to get my money back. And when i was on the flight people going by kept hitting me with their bags. I have tried calling alaska twice to talk about a refund but never got thru to the right person!

Flight crew had the courtesy to ask passengers from my first flight to allow those of us disembarking to go first so that we could make it onto our connecting flights. Worked like a charm. Both crew and fellow passengers working together for a better outcome for all.

We missed our connection to Portland and ended up having to drive.

Spent extra to choose my seat. Found a window available so grabbed it. They did not mention the row didn’t recline. Had over 5 hour flight stuck in a straight back chair. Traveling for funeral - needed to rest and couldn’t get comfortable (row infront of exit😒 should have realized but wasn’t thinking I guess).

You an Kayak offered travel insurance. I had to cancel are flights which I well say was easy an I got my money back. BUT not the travel insurance Kayak or X cover has keep the money. So why I never went on the fligt I cancel way early. I know one thing I'll never go to kayak again.

Check-in was easy, I did it from the app. Boarding was easy, the crew was great. Santa Barbara airport had a disabled plane so we had to land in Burbank to refuel. They kept us well informed, and everyone was great. A very entertaining person from the Burbank airport got on and told a few jokes.

I had to miss that flight as my first flight was cancelled in Idaho Falls. Bad day all around . Couldn’t be rebooked!

Newer plane, relatively easy boarding, not a full flight and was told that we could not be moved up because of weight and balance issues. Otherwise, a very good experience.

Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.

I think they can provide the better food/snack option for the 4 hours flight. Drinks are fine.

It was terrible, if they ran flights on time it would make a big difference.

The food was good. I ate gnocchi with marinara sauce and cheese, salted caramel tiramisu. And later in the trip cheese calzone. I watched 3 movies. The selection is really good. Have new and old movies. The flight attendances were nice and cordially. Overall the 6 hours trip was really pleasant ☺️. Planning the next trip.

Coach seating is debilitating, neither my husband or I can walk the following day

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Late departure due to large number of wheel chair patrons. Used to having a box of snacks to select from in comfort plus. The flight attendant just rattled off what was available and asked us to pick. Felt rushed and uncomfortable. Seat was great. Prefer having the screen on the seat in front of me instead of having to pull it up from the seat side. Lots of room for my carryon under the seat in front of me.

The important things including boarding and the flight being on time and safe were excellent. The disappointment comes from the comfort and amenities. Was misled by the "availability" of inflight internet- there is an extra cost. The tray table was broken, the bathroom door stuck and flight attendants were competent but not very friendly.

Flight was over 2 hours late which made us miss our connecting flight.

Except for the 28 minute delay leaving and the earlier reschedule to a later takeoff time the flight was good.

Loved the leg room and tvs screens on the seats and free WiFi. Wish the price was lower and could save by rebooking

It took 1-1/2 hours to get our luggage after we landed. That to me is unacceptable

The flight was delayed for 4 hours. Once onboard the crew was wonderful.

Overall was excellent. Will definitely us JetBlue in the future.

Love the mosaic program, being able to move to an extra space seat for free is awesome

I rate it is good we had a 4-hour travel delay at one point but JetBlue gave out food vouchers and travel points credits for another flight so they try to make up for it

Smooth boarding and friendly crew. Unfortunately as soon as we boarded the unit that provides air circulation failed. The pilot informed us and requested maintenance technicians to check it out. The plane became uncomfortably warm without any fresh air coming in. Plus the repair delayed our departure. I am glad the maintenance crew were able to fix the problem. I also was without use of my tv monitor for the first 1/3rd of the trip.

Communication with the customer and stay is important. Staff off with a minor inconvenience but it worked out of course. Also this was a very old Mint Class plane. They snuck this one in on us. The updated aircraft are much better.

I paid for the service of having the right to choose my seat and it was not like that, they put me where they wanted and I explained to one of the staff that they were before boarding and they were very rude. I am traveling with the family and they put us in separate seats.

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Old Orchard Beach
Hampton Beach
Ogunquit
Wells
Kennebunkport
Waltham
Hampton
Woburn
South Portland
Kittery
Merrimack
Seabrook
Nashua
Burlington
Kennebunk
Somerville
Marlborough
Saco
Revere
Braintree

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

Information on your arrival and departure airports

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