SEA - BOS

Find cheap flights from Seattle to Boston

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KAYAK searches 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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41,299,237 searches in the past 7 days on KAYAK

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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 return 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 return flight deals from Seattle to Boston

KAYAK's recommended return flight deals from the most popular airlines that fly from Seattle to Boston.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
American Airlines Logo
SEA-BOS
5h 37mdirect
American Airlines Logo
BOS-SEA
6h 28mdirect
American Airlines
Find Deal
Condor Logo
SEA-BOS
5h 20mdirect
Condor Logo
BOS-SEA
6h 13mdirect
Condor
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Qatar Airways Logo
SEA-BOS
5h 37mdirect
Qatar Airways Logo
BOS-SEA
6h 28mdirect
Qatar Airways
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Japan Airlines Logo
SEA-BOS
5h 23mdirect
Japan Airlines Logo
BOS-SEA
6h 28mdirect
Japan Airlines
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Aer Lingus Logo
SEA-BOS
5h 22mdirect
Aer Lingus Logo
BOS-SEA
6h 30mdirect
Aer Lingus
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Air France Logo
SEA-BOS
5h 39mdirect
Air France Logo
BOS-SEA
6h 23mdirect
Air France
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Delta Logo
SEA-BOS
5h 39mdirect
Delta Logo
BOS-SEA
6h 31mdirect
China Eastern Logo
SEA-BOS
5h 34mdirect
China Eastern Logo
BOS-SEA
6h 31mdirect
China Eastern
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EL AL Logo
SEA-BOS
5h 39mdirect
EL AL Logo
BOS-SEA
6h 21mdirect
Alaska Airlines Logo
SEA-BOS
5h 37mdirect
Alaska Airlines Logo
BOS-SEA
6h 28mdirect
Alaska Airlines
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JetBlue Logo
SEA-BOS
5h 37mdirect
JetBlue Logo
BOS-SEA
6h 20mdirect
JetBlue
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Etihad Airways Logo
SEA-BOS
5h 25mdirect
Etihad Airways Logo
BOS-SEA
6h 30mdirect
Etihad Airways
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LATAM Airlines Logo
SEA-BOS
5h 26mdirect
LATAM Airlines Logo
BOS-SEA
6h 16mdirect
LATAM Airlines
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Scandinavian Airlines Logo
SEA-BOS
5h 39mdirect
Scandinavian Airlines Logo
BOS-SEA
6h 22mdirect
Scandinavian Airlines
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Hawaiian Airlines Logo
SEA-BOS
5h 37mdirect
Hawaiian Airlines Logo
BOS-SEA
6h 20mdirect
Hawaiian Airlines
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Korean Air Logo
SEA-BOS
5h 34mdirect
Korean Air Logo
BOS-SEA
6h 28mdirect
Korean Air
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Air Tahiti Nui Logo
SEA-BOS
5h 37mdirect
Air Tahiti Nui Logo
BOS-SEA
6h 13mdirect
Air Tahiti Nui
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TAP AIR PORTUGAL Logo
SEA-BOS
5h 27mdirect
TAP AIR PORTUGAL Logo
BOS-SEA
6h 20mdirect
TAP AIR PORTUGAL
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Virgin Atlantic Logo
SEA-BOS
5h 39mdirect
Virgin Atlantic Logo
BOS-SEA
6h 31mdirect
Virgin Atlantic
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British Airways Logo
SEA-BOS
5h 37mdirect
British Airways Logo
BOS-SEA
6h 30mdirect
British Airways
Find Deal

Expert advice for your flight from Seattle to Boston 
Snippets provided in this section are AI-generated based on a summarisation 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.
Airports
SEA

Use the SEA Spot Saver for free expedited security screening from 04:00 to 22:00. Book online or via the flySEA app.

Read more about SEAby Harriet Baskas
BOS

Take the Silver Line from BOS for a free, convenient ride to South Station in central Boston, taking about 20-30 minutes.

Read more about BOSby Blane Bachelor
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on BOS

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specialising 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 favourite 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.

Read more
Harriet Baskas

Harriet Baskas

Expert on 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, 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

KAYAK's insights & trends for Seattle to Boston flights

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 Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday 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 £168 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is £423 and £399 respectively.

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

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 2 stops stopover the cheapest option at £452 on average.

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 14 weeks before departure.

Good to know - Cheap tickets from Seattle to Boston

Low season

February

High season

August
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly (31% more expensive on average)

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 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.

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.

  • 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, Hawaiian Airlines, American Airlines, Delta, 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.

  • 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 return 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

  • 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, +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 direct flights

Direct returns

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, +18 more

Air France, Air Tahiti Nui, +19 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 direct flights
See more direct flights

Top airline flying 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 9820 reviews
7.1Entertainment
8.5Crew
7.1Food
8.2Boarding
7.9Comfort
Airline reviews

Everything was good. The flight attendants were great. I was disappointed that there wasn’t any screens on the back of the seats to watch movies, tv, etc. I only had my phone to watch movies on.

8.0 ExcellentPeggy, Mar 2025SEA - ATL
Read more Alaska Airlines reviews

Everything was good. The flight attendants were great. I was disappointed that there wasn’t any screens on the back of the seats to watch movies, tv, etc. I only had my phone to watch movies on.

Flight delayed due to engine issue. For 3+ hours still not on flight

Could have had more of a beverage selection than water and apple juice.

They only had one flight to my destination for the entire day. Six hour layover. Coming from their sister airline we didn't have any boarding grouping on our boarding tickets. Had to ask where we were within the grouping.

Flight was over an hour late, and we got notified every 15 minutes, beginning right at boarding, that it would only be 15 more minutes until we finally left about 75 minutes late. Of course, no compensation was offered.

Just in first class they offer blanquets, for main cabin there was no blanquets even if I would buy them

The flight was delayed and then it was very short. The crew was nice. The seats weren't as comfortable on this particular craft.

No food, just a snack on a Seattle to Boston flight? VERY chintzy.

Behind schedule. Lots of time on tarmac. Perhaps unavoidable. Better than crashing!!

It's a pity we missed our flight by 2 minutes.

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

Information on your arrival and departure airports

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