Find flights
Deals
Insights
When to book
FAQs & Tips
Direct Flights
Airlines

SEA - BOS

Find cheap flights from Seattle to Boston from C$ 190

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 7/5. 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.
1 adult
0 bags
Fri 24/5
Fri 31/5

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 44,632,927 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:05 p.m. - 5:36 a.m.SEA-BOS
5h 31mdirect
5:22 p.m. - 10:49 p.m.BOS-SEA
8h 27m1 stop
C$ 412JetBlue
Find Deal
Sun, 5 May - Wed, 8 May
9:05 p.m. - 5:36 a.m.SEA-BOS
5h 31mdirect
4:25 p.m. - 7:30 p.m.BOS-SEA
6h 05mdirect
C$ 420JetBlue
Find Deal
Sun, 5 May - Sun, 19 May
3:35 p.m. - 11:58 p.m.SEA-BOS
5h 23mdirect
6:55 p.m. - 10:12 p.m.BOS-SEA
6h 17mdirect
C$ 427Delta
Find Deal
Mon, 6 May - Tue, 7 May
8:40 p.m. - 5:09 a.m.SEA-BOS
5h 29mdirect
5:22 p.m. - 10:49 p.m.BOS-SEA
8h 27m1 stop
C$ 432JetBlue
Find Deal
Sat, 1 Jun - Tue, 4 Jun
6:30 a.m. - 2:56 p.m.SEA-BOS
5h 26mdirect
7:59 p.m. - 11:08 p.m.BOS-SEA
6h 09mdirect
C$ 447Alaska Airlines
Find Deal
Sat, 25 May - Wed, 12 Jun
1:15 p.m. - 10:33 a.m.SEA-BOS
18h 18m1 stop
11:30 a.m. - 7:55 a.m.BOS-SEA
23h 25m1 stop
C$ 452Sun Country Air
Find Deal
Sat, 18 May - Sun, 26 May
5:00 p.m. - 10:33 a.m.SEA-BOS
14h 33m1 stop
11:30 a.m. - 10:50 p.m.BOS-SEA
14h 20m1 stop
C$ 458Sun Country Air
Find Deal
Sun, 26 May - Fri, 31 May
7:45 p.m. - 7:30 a.m.SEA-BOS
8h 45m1 stop
7:59 p.m. - 11:08 p.m.BOS-SEA
6h 09mdirect
C$ 460Alaska Airlines
Find Deal
Fri, 24 May - Fri, 31 May
3:15 p.m. - 10:33 a.m.SEA-BOS
16h 18m1 stop
7:00 a.m. - 10:15 a.m.BOS-SEA
6h 15mdirect
C$ 465
Find Deal
Sat, 4 May - Sun, 12 May
3:27 p.m. - 11:59 p.m.SEA-BOS
5h 32mdirect
6:55 p.m. - 10:12 p.m.BOS-SEA
6h 17mdirect
C$ 468Delta
Find Deal
Thu, 30 May - Sat, 15 Jun

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 flights from Seattle to Boston clicked on KAYAK for each day over the last 12 months.
When flying from Seattle to Boston, you should consider leaving on a Sunday and avoid Saturdays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Mondays and the most expensive ones on Thursdays.

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 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 February, where tickets cost C$ 298 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is C$ 688 and C$ 681 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from Seattle to Boston, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 14 days before departure.

Which airlines provide the cheapest flights from Seattle to Boston?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Boston from Seattle were found on JetBlue (C$ 190) and Delta (C$ 224), and the lowest round-trip tickets were found on JetBlue (C$ 412) and Delta (C$ 427).

Which airlines fly direct between Seattle and Boston?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Seattle to Boston.
There are 3 airlines that fly direct from Seattle to Boston. They are: Alaska Airlines, Delta and JetBlue. The cheapest price of all airlines flying this route was found with Delta at C$ 163. On average, the best prices for this route can be found at Delta.

How many flights are there between Seattle and Boston per day?

Each day, there are between 11 and 18 nonstop flights that take off from Seattle and land in Boston, with an average flight time of 5h 26m. The most common departure time is 3:00 p.m. and most flights take off in the morning. Each week, there are 102 flights. The most frequent day of departure is Sunday, when 18% of all weekly flights depart. The fewest flights depart on a Wednesday.

Which cabin class options are there for flights between Seattle and Boston?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 2 cabin class options for the route. These are Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to Boston take?

The duration of a direct flight to Boston from Seattle is typically 5h 14m. The journey crosses a distance of 6,441 km.

What’s the earliest departure time from Seattle to Boston?

Early birds can take the earliest flight from Seattle at 6:30 am and will be landing in Boston at 2:56 pm.

What’s the latest departure time from Seattle to Boston?

If you prefer to fly at night, the latest flight from Seattle to Boston jets off at 10:40 pm and lands at 7:00 am.

Good to know

Low season

January

High season

August

Cheapest flight

C$ 190
Best time to beat the crowds (36% less expensive on average)
Most popular time to fly (23% 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$ 139 for a one-way ticket and C$ 301 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, Delta, American Airlines, Virgin Atlantic, and Hawaiian Airlines.

  • 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$ 470 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$ 327 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

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$ 210 or less one-way and C$ 510 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 non-stop from Seattle to Boston?

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

Nonstop departures

Seattle/Tacoma Intl to Boston Logan Intl

Monday

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

Air France,Air Tahiti Nui, +14 more

Tuesday

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

Air France,Air Tahiti Nui, +16 more

Wednesday

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

Air France,Air Tahiti Nui, +14 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, +13 more

Air France,Air Tahiti Nui, +14 more

Saturday

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

Aer Lingus,Air France, +17 more

Sunday

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

Air France,Air Tahiti Nui, +16 more

See more nonstop flights

Nonstop returns

Boston Logan Intl to Seattle/Tacoma Intl

Monday

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

Aer Lingus,Air France, +18 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, +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, +15 more

Aer Lingus,Air France, +16 more

Sunday

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

Aer Lingus,Air France, +17 more

See more nonstop flights
See more nonstop flights

Top 4 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.
8.8
Endeavor AirlinesOverall score based on 4 reviews
7.0entertainment
8.5food
9.5boarding
9.5crew
9.5comfort
Airline reviews
Pros: "seat space was great and I was lucky enough to have medium size passenger next to me :-)"
Cons: "Can't really think of anything . . . my expectations were exceeded"
8.6 ExcellentIllan, Jun. 2019YYZ - JFK
Read more about Endeavor Airlines reviews
Pros: "seat space was great and I was lucky enough to have medium size passenger next to me :-)"
Cons: "Can't really think of anything . . . my expectations were exceeded"

Flight was good. Glad it was delayed or I may have missed the connection since I got to Seattle at about the same time my connection was to leave. The snack was a small bag of pretzels and a small soda. Can’t really call that food. There was no entertainment available on the flight.

Same as the earlier flight. Bad boarding practices, uncomfortable seats, and no Wi-Fi service.

Everything was good. One of the flight attendants was not very friendly

Text and wifi were paywalled. I'm not looking for something fast, but not getting a text for ride coordination until back at the gate was a pain.

It was not a great flight. There was a software update delay which had us on the ground for almost 2 hours. I was unable to make my shuttle to my final destination.

Good. Quiet. Comfortable. The protests nearly kept me from catching my flight. They waited for me! I made it!

Red eye flight, so not expecting any extras, but the boarding and trip was smooth. Thx Alaska.

Received little assistance with air sick child. Crew’s main concern was if anything got on the seat belt!

Flight was excellent! Comfortable seats. Flew out of IND. very friendly crew!

It was fine… Just overbooked every seat was taken and very bumpy nothing they could do about that. Overall I like to fly Alaska airlines

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Terrible. Delta delays caused us to miss our flight and they did nothing to fix it.

The A330-200 was showing its age but otherwise this was a pleasant flight with friendly crew. The meals/snack provided were pretty good.

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

The most unprofessional and disorganized experience I’ve ever had with an airlines. After the flight was diverted on the runway and we returned to the gate, there was no communication about the plans and it took an additional 5 hours to get set up with a hotel and a new flight, information that was not readily given to the passengers and mostly gotten second hand from what other passengers heard from each other. Based on this experience I cannot recommend flying delta again

Crew was not friendly when I went to request a seat change.

Business class is great. New airplane, very comfortable, better than some of the major airlines I am used to

Delayed by almost an hour - I also noticed that all JetBlue flights departing from PBI were delayed yet the weather was perfect.

I loved the wifi, much better than Delta. Seats were old. and bathrooms dingy.

There was no wheelchair or wheelchair escort at the gate..unacceptable

Delayed 4 hours because of maintenance issue they knew about all day. Get another plane. Time is precious!

I liked that boarding and take off were timely despite a 15 minute delay due to weather. The pilot communicated with us the entire flight keeping us informed re: turbulance and slight delays on the runway after we landed.

Has been always great except flight cancelation in the past at very last minute waiting till 2am and we when have to beg for overnight accommodation

There were weather issues and coding problems whatever those refer to, but JetBlue, for two days in a row was unbelievably late. Several hours late, resulting in almost no sleep for passengers like me.

The plane was very hot. There were delays . Generally, the flight was great.

If jet blue is going to offer tv at every seat, fix the headphone connection so you can hear. Haven’t had a usable headphone jack in years

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.
7/5Tue
directJetBlue
5h 29mSEA-BOS
C$ 190
2/5Thu
directJetBlue
5h 31mSEA-BOS
C$ 211
21/5Tue
directDelta
5h 32mSEA-BOS
C$ 224
15/5Wed
1 stopUnited Airlines
7h 38mSEA-BOS
C$ 235
24/5Fri
1 stopAlaska Airlines
8h 45mSEA-BOS
C$ 237
12/6Wed
directDelta
5h 40mSEA-BOS
C$ 245
1/5Wed
2 stopsUnited Airlines
15h 19mSEA-BOS
C$ 249
24/5Fri
directAlaska Airlines
5h 25mSEA-BOS
C$ 252
9/7Tue
1 stopSun Country Air
26h 09mSEA-BOS
C$ 271
28/6Fri
1 stopSun Country Air
7h 23mSEA-BOS
C$ 360

Search by stops

Search by airline

Search by price

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.
29/4Mon
multi-stopDelta
7h 19mSEA-BOS
1/5Wed
directDelta
6h 15mBOS-SEA
C$ 590
29/4Mon
multi-stopDelta
7h 19mSEA-BOS
1/5Wed
directDelta
6h 20mBOS-SEA
C$ 603
29/4Mon
multi-stopDelta
7h 19mSEA-BOS
9/5Thu
directDelta
6h 13mBOS-SEA
C$ 645
26/4Fri
directAlaska Airlines
5h 28mSEA-BOS
29/4Mon
directAlaska Airlines
6h 15mBOS-SEA
C$ 660
27/4Sat
multi-stopUnited Airlines
9h 49mSEA-BOS
11/5Sat
multi-stopUnited Airlines
10h 19mBOS-SEA
C$ 718
27/4Sat
multi-stopUnited Airlines
15h 07mSEA-BOS
11/5Sat
multi-stopUnited Airlines
13h 36mBOS-SEA
C$ 725
27/4Sat
directJetBlue
5h 32mSEA-BOS
11/5Sat
multi-stopJetBlue
8h 27mBOS-SEA
C$ 740
25/4Thu
multi-stopSun Country Air
14h 08mSEA-BOS
27/4Sat
multi-stopSun Country Air
23h 00mBOS-SEA
C$ 753
25/4Thu
directJetBlue
5h 32mSEA-BOS
28/4Sun
directJetBlue
6h 11mBOS-SEA
C$ 899
26/4Fri
directAlaska Airlines
5h 20mSEA-BOS
28/4Sun
directAlaska Airlines
6h 14mBOS-SEA
C$ 2,158

Search by stops

Search by airline

Search by price

Seattle - Boston Flights

Departure:

Seattle (SEA)United States

Destination:

Boston (BOS)United States

Return flight deals:

Boston - Seattle

Cabin classes:

C$ 1,722
C$ 1,290
C$ 313

Browse origins:

  • Flights » 
  • Seattle

Browse destinations:

  • Flights » 
  • Worldwide » 
  • Boston