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SEA - BOS

$244 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 3/9. 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
Sun 23/6
Sun 30/6

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 43,278,837 times on KAYAK, and here's 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.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
22:00 - 06:20SEA-BOS
5h 20mdirect
18:35 - 21:56BOS-SEA
6h 21mdirect
$484Delta
Find Deal
Wed, 23 Oct - Wed, 30 Oct
22:16 - 06:39SEA-BOS
5h 23mdirect
17:45 - 21:06BOS-SEA
6h 21mdirect
$486JetBlue
Find Deal
Wed, 11 Sep - Tue, 17 Sep
18:07 - 23:16SEA-BOS
26h 09m1 stop
06:15 - 11:46BOS-SEA
8h 31m1 stop
$499Sun Country Air
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Tue, 9 Jul - Sat, 13 Jul
22:16 - 06:39SEA-BOS
5h 23mdirect
13:10 - 22:49BOS-SEA
12h 39m1 stop
$501JetBlue
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Wed, 11 Sep - Tue, 17 Sep
21:29 - 05:44SEA-BOS
5h 15mdirect
07:00 - 10:17BOS-SEA
6h 17mdirect
$502Alaska Airlines
Find Deal
Sat, 21 Sep - Wed, 25 Sep
18:07 - 23:16SEA-BOS
26h 09m1 stop
06:15 - 22:53BOS-SEA
19h 38m1 stop
$515Sun Country Air
Find Deal
Tue, 9 Jul - Mon, 15 Jul
21:29 - 05:44SEA-BOS
5h 15mdirect
07:00 - 12:52BOS-SEA
8h 52m1 stop
$517Alaska Airlines
Find Deal
Sat, 21 Sep - Wed, 9 Oct
00:30 - 12:34SEA-BOS
9h 04m1 stop
19:05 - 00:54BOS-SEA
8h 49m1 stop
$803United Airlines
Find Deal
Wed, 3 Jul - Fri, 5 Jul
00:25 - 11:17SEA-BOS
7h 52m1 stop
19:10 - 00:59BOS-SEA
8h 49m1 stop
$844United Airlines
Find Deal
Thu, 6 Jun - Mon, 10 Jun
13:10 - 10:30SEA-BOS
18h 20m2 stops
19:50 - 09:25BOS-SEA
16h 35m2 stops
$852Southwest
Find Deal
Thu, 4 Jul - Sun, 7 Jul

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 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 January, where tickets cost $373 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $831 and $815 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 41 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 last 72 hours, the best return deals on flights connecting Seattle to Boston were found on Delta ($484) and JetBlue ($486). Alaska Airlines proposed the cheapest one-way flight at $244.

Which airlines fly most frequently between Seattle and Boston?

The airlines most regularly connecting Seattle to Boston are Alaska Airlines (7 flights per day), Delta (6 flights per day), and JetBlue (2 flights per day).

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

Each day, there are between 14 and 20 nonstop flights that take off from Seattle and land in Boston, with an average flight time of 5h 28m. The most common departure time is 10:00 and most flights take off in the morning. Each week, there are 111 flights. The most frequent day of departure is Thursday, 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 is only one cabin class option available for the route, which is 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 average direct flight takes 5h 14m, covering 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 06:30 and will be landing in Boston at 14:52.

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 23:36 and lands at 07:55.

Good to know

Low season

January

High season

August

Cheapest flight

$244
Best time to beat the crowds (40% less expensive on average)
Most popular time to fly (20% 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 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.

  • 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 $149 for a one-way ticket and $296 for a return.

  • Which airports will I be using when flying from Seattle to Boston?

    Seattle airport is called Seattle/Tacoma Intl and the only airport in Boston is Boston Logan Intl.

  • 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, Hawaiian Airlines, Virgin Atlantic, and Aeromexico.

  • 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/Tacoma Intl to Boston Logan Intl?

Find which airlines fly direct from Seattle/Tacoma Intl to Logan Intl, 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, +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, +14 more

Air France, Air Tahiti Nui, +15 more

See more direct flights

Direct 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, +14 more

Aer Lingus, Air France, +15 more

Wednesday

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

Aer Lingus, Air France, +17 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, +15 more

Aer Lingus, Air France, +16 more

Saturday

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

Aer Lingus, Air France, +17 more

Sunday

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

Aer Lingus, Air France, +16 more

See more direct flights
See more direct flights

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.
3/9Tue
directAlaska Airlines
5h 15mSEA-BOS
$244
18/7Thu
1 stopSun Country Air
20h 47mSEA-BOS
$250
21/9Sat
directAlaska Airlines
5h 15mSEA-BOS
$260
23/7Tue
1 stopJetBlue
10h 13mSEA-BOS
$267
7/7Sun
2 stopsSpirit Airlines
23h 58mSEA-BOS
$277
18/6Tue
directJetBlue
5h 28mSEA-BOS
$293
13/6Thu
directDelta
5h 30mSEA-BOS
$301
3/7Wed
1 stopUnited Airlines
9h 04mSEA-BOS
$370
13/8Tue
1 stopUnited Airlines
7h 45mSEA-BOS
$373
2/8Fri
directDelta
5h 26mSEA-BOS
$391

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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.
29/5Wed
directDelta
5h 32mSEA-BOS
31/5Fri
directDelta
6h 17mBOS-SEA
$650
29/5Wed
directJetBlue
5h 29mSEA-BOS
5/6Wed
multi-stopJetBlue
8h 27mBOS-SEA
$672
29/5Wed
multi-stopSun Country Air
13h 48mSEA-BOS
1/6Sat
multi-stopSun Country Air
8h 10mBOS-SEA
$679
29/5Wed
directJetBlue
5h 29mSEA-BOS
1/6Sat
multi-stopJetBlue
10h 04mBOS-SEA
$690
29/5Wed
multi-stopSun Country Air
13h 48mSEA-BOS
7/6Fri
multi-stopSun Country Air
24h 23mBOS-SEA
$728
25/5Sat
multi-stopSun Country Air
22h 48mSEA-BOS
3/6Mon
multi-stopSun Country Air
28h 40mBOS-SEA
$761
26/5Sun
multi-stopAlaska Airlines
9h 36mSEA-BOS
31/5Fri
multi-stopAlaska Airlines
8h 42mBOS-SEA
$910
25/5Sat
directAlaska Airlines
5h 25mSEA-BOS
13/6Thu
directAlaska Airlines
6h 23mBOS-SEA
$944
29/5Wed
multi-stopUnited Airlines
11h 25mSEA-BOS
1/6Sat
multi-stopUnited Airlines
14h 41mBOS-SEA
$1,011
28/5Tue
multi-stopUnited Airlines
12h 38mSEA-BOS
4/6Tue
multi-stopUnited Airlines
11h 26mBOS-SEA
$1,014

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Search by price

Seattle - Boston Flights

Departure:

Seattle (SEA)United States

Destination:

Boston (BOS)United States

Cabin classes:

Browse origins:

  • Flights » 
  • Seattle

Browse destinations:

  • Flights » 
  • Boston