SEA - BOS

C$ 156 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 25/1. 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
In the last 7 days, travellers have searched 41,299,237 times on KAYAK, and here is why:

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Boston 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
3:20 p.m. - 11:30 p.m.SEA-BOS
5h 10mdirect
10:45 a.m. - 2:10 p.m.BOS-SEA
6h 25mdirect
C$ 310JetBlue
Find Deal
Wed, 8 Jan - Fri, 10 Jan
3:20 p.m. - 11:30 p.m.SEA-BOS
5h 10mdirect
10:45 a.m. - 2:10 p.m.BOS-SEA
6h 25mdirect
C$ 311JetBlue
Find Deal
Wed, 8 Jan - Tue, 14 Jan
8:59 p.m. - 3:29 p.m.SEA-BOS
15h 30m1 stop
7:00 a.m. - 10:38 a.m.BOS-SEA
6h 38mdirect
C$ 324Alaska Airlines
Find Deal
Thu, 9 Jan - Sat, 18 Jan
5:22 a.m. - 5:20 p.m.SEA-BOS
8h 58m1 stop
4:27 p.m. - 11:31 p.m.BOS-SEA
10h 04m1 stop
C$ 337American Airlines
Find Deal
Fri, 10 Jan - Mon, 13 Jan
3:30 p.m. - 11:55 p.m.SEA-BOS
5h 25mdirect
6:35 p.m. - 10:15 p.m.BOS-SEA
6h 40mdirect
C$ 340Delta
Find Deal
Mon, 24 Mar - Sat, 29 Mar
11:05 a.m. - 11:59 p.m.SEA-BOS
9h 54m2 stops
6:00 a.m. - 12:07 p.m.BOS-SEA
9h 07m1 stop
C$ 346United Airlines
Find Deal
Wed, 8 Jan - Fri, 10 Jan
9:59 p.m. - 3:23 p.m.SEA-BOS
14h 24m1 stop
6:24 p.m. - 9:59 p.m.BOS-SEA
6h 35mdirect
C$ 353Alaska Airlines
Find Deal
Thu, 27 Feb - Tue, 4 Mar
7:30 a.m. - 3:59 p.m.SEA-BOS
5h 29mdirect
7:10 a.m. - 10:45 a.m.BOS-SEA
6h 35mdirect
C$ 354Delta
Find Deal
Thu, 16 Jan - Mon, 20 Jan
12:25 a.m. - 1:18 p.m.SEA-BOS
9h 53m1 stop
4:10 p.m. - 10:09 p.m.BOS-SEA
8h 59m1 stop
C$ 366American Airlines
Find Deal
Mon, 17 Feb - Fri, 28 Feb
9:00 a.m. - 9:59 p.m.SEA-BOS
9h 59m2 stops
2:00 p.m. - 8:19 p.m.BOS-SEA
9h 19m1 stop
C$ 389United Airlines
Find Deal
Tue, 11 Feb - Fri, 21 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$ 313 (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$ 765 and C$ 733 respectively.

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

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$ 398, prices are generally cheapest when you fly direct.

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$ 156
Best time to beat the crowds (42% less expensive on average)
Most popular time to fly (30% 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$ 109 for a one-way ticket and C$ 216 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, Hawaiian Airlines, Lufthansa, and KLM.

  • 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$ 514 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$ 379 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$ 331 or less one-way and C$ 354 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

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

Air France,Air Tahiti Nui, +13 more

Tuesday

Air France,Air Tahiti Nui,Alaska Airlines, +14 more

Air France,Air Tahiti Nui, +15 more

Wednesday

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

Air France,Air Tahiti Nui, +13 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, +12 more

Air France,Air Tahiti Nui, +13 more

Saturday

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

Air France,Air Tahiti Nui, +16 more

Sunday

Air France,Air Tahiti Nui,Alaska Airlines, +14 more

Air France,Air Tahiti Nui, +15 more

See more nonstop flights

Direct returns

Boston Logan Intl to Seattle/Tacoma 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, +14 more

Air France,Air Tahiti Nui, +15 more

Wednesday

Air France,Air Tahiti Nui,Alaska Airlines, +14 more

Air France,Air Tahiti Nui, +15 more

Thursday

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

Air France,Air Tahiti Nui, +16 more

Friday

Air France,Air Tahiti Nui,Alaska Airlines, +14 more

Air France,Air Tahiti Nui, +15 more

Saturday

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

Air France,Air Tahiti Nui, +16 more

Sunday

Air France,Air Tahiti Nui,Alaska Airlines, +14 more

Air France,Air Tahiti Nui, +15 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 9551 reviews
7.1Entertainment
7.9Comfort
7.2Food
8.2Boarding
8.5Crew
Airline reviews

The plane was delayed for over an hour because of a family who didn't speak English, and didn't understand what was asked of them. While I understand the delay, I thought it was unfair to keep us all waiting for over an hour to get to our destination and a better approach should've been exercised.

2.0 MediocreAnonymous, Dec 2024SEA - JFK
Read more Alaska Airlines reviews

The plane was delayed for over an hour because of a family who didn't speak English, and didn't understand what was asked of them. While I understand the delay, I thought it was unfair to keep us all waiting for over an hour to get to our destination and a better approach should've been exercised.

Finally get a snack n drinks! Just like the good ole days!

Absolutely fine. No problems. I have mobility issues and they were perfectly addressed.

The website said ear phones were provided in first class. They were not. But a lot of programs had captions

I didn’t make it because Alaska schedule my flight too tight, I had to run to the other side of the airport, and no one helped me get off the plane early or held the plane for me… so I missed it and it was Alaskas bad, not mine

The flight took off two hours late and involved a gate and plane change. It might have better if they had announced a problem from the beginning, not when we were boarding. Annoying, but better to be safe.

My experience was great! The crew is great always happy and friendly :) thank you Alaska!!

We were delayed over an hour because of fog at the destination--not Alaska's fault, but it still made the experience a little frustrating on the day before Thanksgiving.

We were amazed by the amazing food, comfort and service received in our coach seats. Pleasantly surprised we received breakfast and great beverages for no charge. Bag check fee was on $35. The crew was so kind and helpful. Highly recommend!

SeaTac was a mess first class check-in not clearly identified Temporary signage needed since only one door into Alaska check-in area directed you to coach baggage check.

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.

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

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.

The flight itself was fine, but the boarding process was extremely frustrating. There is no one scanning boarding passes - passengers just scan themselves and enter the jetway. By the time my husband and I got on the plane and were halfway to our seats they determined there were too many bags on the plane and everything at that point needed to be checked. This created a lot of unnecessary chaos. They should have alerted people before getting on the plane that they would need to start checking bags instead of waiting until people were already on the plane.

The best flight I’ve had in a while. The plane was like 25% capacity, if that. Smoothest boarding and deplaning process I’ve ever experienced. Wish all flights were this smooth.

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.

Everything was great except for some reason crew and ground crew could not figure out how to deal with an electric wheelchair and it delayed us 20-30mins. Was pretty frustrating for passengers and the captain.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Book cheap flights from Seattle to Boston

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Boston found on KAYAK in the last 72 hours.
25/1Sat
directDelta
5h 29mSEA-BOS
C$ 156
13/1Mon
1 stopAmerican Airlines
9h 58mSEA-BOS
C$ 169
15/1Wed
2 stopsUnited Airlines
9h 54mSEA-BOS
C$ 176
14/2Fri
1 stopUnited Airlines
9h 12mSEA-BOS
C$ 212
31/1Fri
2 stopsSouthwest
11h 10mSEA-BOS
C$ 234
5/1Sun
directAlaska Airlines
5h 20mSEA-BOS
C$ 235
16/6Mon
1 stopJetBlue
10h 51mSEA-BOS
C$ 257
26/12Thu
directAlaska Airlines
5h 20mSEA-BOS
C$ 271
3/1Fri
directJetBlue
5h 07mSEA-BOS
C$ 357
5/1Sun
1 stopSouthwest
12h 15mSEA-BOS
C$ 379

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Last minute flights from Seattle to Boston

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Boston that are departing in the next 10 days.
24/12Tue
directAlaska Airlines
5h 20mSEA-BOS
9/1Thu
directAlaska Airlines
6h 39mBOS-SEA
C$ 466
23/12Mon
directDelta
5h 27mSEA-BOS
9/1Thu
directDelta
6h 35mBOS-SEA
C$ 524
24/12Tue
multi-stopDelta
8h 56mSEA-BOS
9/1Thu
directDelta
6h 20mBOS-SEA
C$ 538
23/12Mon
multi-stopAmerican Airlines
9h 00mSEA-BOS
6/1Mon
multi-stopAmerican Airlines
9h 57mBOS-SEA
C$ 572
24/12Tue
directAlaska Airlines
5h 20mSEA-BOS
7/1Tue
directAlaska Airlines
6h 39mBOS-SEA
C$ 581
24/12Tue
multi-stopUnited Airlines
11h 47mSEA-BOS
8/1Wed
multi-stopUnited Airlines
10h 50mBOS-SEA
C$ 637
23/12Mon
multi-stopAmerican Airlines
9h 00mSEA-BOS
8/1Wed
multi-stopAmerican Airlines
10h 35mBOS-SEA
C$ 716
20/12Fri
multi-stopUnited Airlines
11h 57mSEA-BOS
8/1Wed
multi-stopUnited Airlines
10h 50mBOS-SEA
C$ 773
22/12Sun
directJetBlue
5h 07mSEA-BOS
27/12Fri
directJetBlue
6h 22mBOS-SEA
C$ 1,265
20/12Fri
directJetBlue
5h 07mSEA-BOS
27/12Fri
directJetBlue
6h 22mBOS-SEA
C$ 1,380

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

Information on your arrival and departure airports

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