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

SEA - BOS

$193 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 10/9. 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 25/8
Sun 1/9

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 50,552,696 times on KAYAK, and here's why:

Save 14% 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
15:31 - 23:59SEA-BOS
5h 28mdirect
07:10 - 10:31BOS-SEA
6h 21mdirect
$384Delta
Find Deal
Tue, 15 Oct - Wed, 23 Oct
23:47 - 10:26SEA-BOS
7h 39m1 stop
17:15 - 20:35BOS-SEA
6h 20mdirect
$400JetBlue
Find Deal
Tue, 24 Sep - Tue, 8 Oct
21:45 - 06:10SEA-BOS
5h 25mdirect
17:15 - 20:35BOS-SEA
6h 20mdirect
$418JetBlue
Find Deal
Wed, 4 Sep - Wed, 11 Sep
23:22 - 07:55SEA-BOS
5h 33mdirect
07:25 - 10:45BOS-SEA
6h 20mdirect
$427Delta
Find Deal
Mon, 16 Sep - Wed, 18 Sep
20:45 - 08:20SEA-BOS
8h 35m1 stop
18:30 - 08:15BOS-SEA
16h 45m1 stop
$459Alaska Airlines
Find Deal
Mon, 16 Sep - Wed, 18 Sep
21:29 - 05:44SEA-BOS
5h 15mdirect
18:30 - 08:15BOS-SEA
16h 45m1 stop
$467Alaska Airlines
Find Deal
Sat, 21 Sep - Wed, 25 Sep
23:59 - 13:23SEA-BOS
10h 24m2 stops
10:35 - 20:08BOS-SEA
12h 33m2 stops
$603United Airlines
Find Deal
Tue, 15 Oct - Wed, 23 Oct
23:59 - 10:30SEA-BOS
7h 31m1 stop
09:00 - 11:01BOS-SEA
29h 01m1 stop
$667Sun Country Air
Find Deal
Fri, 30 Aug - Mon, 2 Sep
23:59 - 10:30SEA-BOS
7h 31m1 stop
11:34 - 16:53BOS-SEA
8h 19m1 stop
$677Sun Country Air
Find Deal
Fri, 30 Aug - Thu, 5 Sep
13:45 - 00:44SEA-BOS
7h 59m1 stop
06:00 - 15:24BOS-SEA
12h 24m2 stops
$679United Airlines
Find Deal
Fri, 27 Sep - Sat, 5 Oct

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 $386 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $891 and $842 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 150 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 JetBlue ($384) and Delta ($427). Delta proposed the cheapest one-way flight at $193.

Which airlines fly most frequently between Seattle and Boston?

Seattle and Boston are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (28 flights per week), Delta (20 flights per week), and JetBlue (14 flights per week).

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

Each day, there are between 8 and 9 nonstop flights that take off from Seattle and land in Boston, with an average flight time of 5h 25m. The most common departure time is 15:00 and most flights take off in the morning. Each week, there are 62 flights. The most frequent day of departure is Monday, when 15% of all weekly flights depart. The fewest flights depart on a Saturday.

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 07m, 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

$193
Best time to beat the crowds (40% less expensive on average)
Most popular time to fly (22% 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 $114 for a one-way ticket and $227 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, American Airlines, Delta, Hawaiian Airlines, 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

  • Looking for a cheap flight? 25% of our users found flights on this route for $488 or less one-way.
  • 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 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 Tahiti Nui, Alaska Airlines, American Airlines, +14 more

Air Tahiti Nui, Alaska Airlines, +15 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +16 more

Air Tahiti Nui, Alaska Airlines, +17 more

Wednesday

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

Air Tahiti Nui, Alaska Airlines, +15 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +16 more

Air Tahiti Nui, Alaska Airlines, +17 more

Friday

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

Air Tahiti Nui, Alaska Airlines, +15 more

Saturday

Aer Lingus, Air Tahiti Nui, Alaska Airlines, +16 more

Aer Lingus, Air Tahiti Nui, +17 more

Sunday

Aer Lingus, Air Tahiti Nui, Alaska Airlines, +15 more

Aer Lingus, Air Tahiti Nui, +16 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, +15 more

Aer Lingus, Air France, +16 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.
10/9Tue
directDelta
5h 22mSEA-BOS
$193
15/10Tue
1 stopJetBlue
7h 39mSEA-BOS
$208
27/9Fri
1 stopAlaska Airlines
7h 35mSEA-BOS
$251
6/9Fri
directAlaska Airlines
5h 14mSEA-BOS
$261
15/9Sun
1 stopSun Country Air
22h 44mSEA-BOS
$268
8/9Sun
1 stopSun Country Air
22h 53mSEA-BOS
$293
21/1Tue
2 stopsUnited Airlines
10h 14mSEA-BOS
$369
21/1Tue
3 stopsUnited Airlines
15h 12mSEA-BOS
$378
1/8Thu
2 stopsSouthwest
13h 30mSEA-BOS
$427
1/8Thu
3 stopsSouthwest
13h 50mSEA-BOS
$435

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.
31/7Wed
multi-stopSun Country Air
7h 27mSEA-BOS
1/9Sun
multi-stopSun Country Air
23h 39mBOS-SEA
$652
31/7Wed
directDelta
5h 43mSEA-BOS
20/8Tue
directDelta
6h 22mBOS-SEA
$808
31/7Wed
multi-stopJetBlue
10h 11mSEA-BOS
20/8Tue
directJetBlue
6h 13mBOS-SEA
$811
31/7Wed
multi-stopDelta
7h 22mSEA-BOS
14/8Wed
directDelta
6h 30mBOS-SEA
$825
31/7Wed
multi-stopDelta
7h 22mSEA-BOS
6/8Tue
directDelta
6h 22mBOS-SEA
$943
30/7Tue
multi-stopUnited Airlines
9h 45mSEA-BOS
20/8Tue
multi-stopUnited Airlines
10h 06mBOS-SEA
$1,009
31/7Wed
multi-stopUnited Airlines
7h 45mSEA-BOS
14/8Wed
multi-stopUnited Airlines
13h 13mBOS-SEA
$1,018
30/7Tue
multi-stopAlaska Airlines
8h 50mSEA-BOS
6/8Tue
directAlaska Airlines
6h 23mBOS-SEA
$1,026
29/7Mon
directAlaska Airlines
5h 19mSEA-BOS
31/7Wed
directAlaska Airlines
6h 23mBOS-SEA
$1,096
27/7Sat
directJetBlue
5h 18mSEA-BOS
7/8Wed
directJetBlue
6h 20mBOS-SEA
$1,189

Search by stops

Search by airline

Search by price

Seattle - Boston Flights

Departure:

Seattle (SEA)United States

Destination:

Boston (BOS)United States

Cabin classes:

$594

Browse origins:

  • Flights » 
  • Seattle

Browse destinations:

  • Flights » 
  • Boston