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Cheap flights from Seattle to Boston from $113

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Boston departing on 4/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Boston

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Boston.
Alaska Airlines Logo
11:30 pm - 7:52 amSEA-BOS
5h 22mnonstop
Alaska Airlines Logo
7:00 am - 10:13 amBOS-SEA
6h 13mnonstop
$224Alaska Airlines
Find Deal
Sat, Apr 19 - Sun, Apr 27
Hawaiian Airlines Logo
3:45 pm - 11:59 pmSEA-BOS
5h 14mnonstop
Hawaiian Airlines Logo
7:00 am - 10:13 amBOS-SEA
6h 13mnonstop
$237Hawaiian Airlines
Find Deal
Sat, Apr 19 - Mon, Apr 28
United Airlines Logo
8:10 am - 7:32 pmSEA-BOS
8h 22m1 stop
United Airlines Logo
11:00 am - 6:30 pmBOS-SEA
10h 30m1 stop
$267United Airlines
Find Deal
Wed, May 7 - Tue, May 13
JetBlue Logo
11:38 am - 8:10 pmSEA-BOS
5h 32mnonstop
JetBlue Logo
3:10 pm - 8:54 pmBOS-SEA
8h 44m1 stop
$277JetBlue
Find Deal
Wed, May 14 - Thu, May 15
JetBlue Logo
10:40 pm - 11:42 amSEA-BOS
10h 02m1 stop
JetBlue Logo
3:10 pm - 8:54 pmBOS-SEA
8h 44m1 stop
$281JetBlue
Find Deal
Wed, May 14 - Thu, May 15
United Airlines Logo
11:37 pm - 10:23 amSEA-BOS
7h 46m1 stop
United Airlines Logo
6:00 am - 11:32 amBOS-SEA
8h 32m1 stop
$283United Airlines
Find Deal
Fri, May 23 - Sun, May 25
American Airlines Logo
6:42 am - 8:42 pmSEA-BOS
11h 00m1 stop
American Airlines Logo
5:00 am - 10:15 amBOS-SEA
8h 15m1 stop
$305American Airlines
Find Deal
Sat, Apr 19 - Mon, Apr 28
Delta Logo
3:20 pm - 11:54 pmSEA-BOS
5h 34mnonstop
Delta Logo
6:35 pm - 10:13 pmBOS-SEA
6h 38mnonstop
$317Delta
Find Deal
Wed, Sep 3 - Wed, Sep 10
Delta Logo
10:05 pm - 6:31 amSEA-BOS
5h 26mnonstop
Delta Logo
7:25 am - 10:45 amBOS-SEA
6h 20mnonstop
$332Delta
Find Deal
Sun, Apr 27 - Sun, May 4
American Airlines Logo
12:59 am - 1:18 pmSEA-BOS
9h 19m1 stop
American Airlines Logo
6:25 am - 2:03 pmBOS-SEA
10h 38m1 stop
$339American Airlines
Find Deal
Sun, Apr 20 - Wed, Apr 30

Alaska Airlines flights from Seattle to Boston

Our best Alaska Airlines deals on Seattle to Boston flight tickets
Alaska Airlines
Apr 19
SEA11:30 pmSeattle/Tacoma Intl
5h 22m
BOS7:52 amBoston Logan Intl
Apr 27
BOS7:00 amBoston Logan Intl
6h 13m
SEA10:13 amSeattle/Tacoma Intl
Alaska Airlines
May 7
SEA3:36 pmSeattle/Tacoma Intl
5h 23m
BOS11:59 pmBoston Logan Intl
May 16
BOS6:52 pmBoston Logan Intl
6h 08m
SEA10:00 pmSeattle/Tacoma Intl
Alaska Airlines
May 21
SEA6:59 pmSeattle/Tacoma Intl
9h 41m
1 stop
BOS7:40 amBoston Logan Intl
May 28
BOS4:30 pmBoston Logan Intl
6h 11m
SEA7:41 pmSeattle/Tacoma Intl

Hawaiian Airlines flights from Seattle to Boston

Our best Hawaiian Airlines deals on Seattle to Boston flight tickets
Hawaiian Airlines
Apr 19
SEA3:45 pmSeattle/Tacoma Intl
5h 14m
BOS11:59 pmBoston Logan Intl
Apr 28
BOS7:00 amBoston Logan Intl
6h 13m
SEA10:13 amSeattle/Tacoma Intl
Hawaiian Airlines
Apr 19
SEA3:45 pmSeattle/Tacoma Intl
5h 14m
BOS11:59 pmBoston Logan Intl
Apr 28
BOS7:00 amBoston Logan Intl
6h 13m
SEA10:13 amSeattle/Tacoma Intl
Hawaiian Airlines
Apr 17
SEA3:45 pmSeattle/Tacoma Intl
5h 14m
BOS11:59 pmBoston Logan Intl
Apr 28
BOS7:00 amBoston Logan Intl
6h 13m
SEA10:13 amSeattle/Tacoma Intl

See travel insights to Boston from

How to get the cheapest flight ticket from Seattle to Boston

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Boston?

In general, January is the cheapest month to fly from Seattle to Boston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $217. If you aren’t able to travel during the month of January, then book flights to Boston from Seattle during February instead. Flights to Boston in February, while not as cheap as those in January, still average around $284.

What is the cheapest day to depart on your flight to Boston?

The cheapest day to depart from Seattle to Boston is on a Friday when prices can be found for as low as $388. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Boston on Sunday is $548.

What is the cheapest time of day to depart on your flight to Boston?

According to our data, the cheapest time of day to fly to Boston is in the afternoon. momondo users have found flights departing from Seattle to Boston in the afternoon for as low as $369. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Boston, so prices are often more expensive at around $488 per ticket.

What is the cheapest Seattle/Tacoma Intl to Boston Logan Intl flight route?

Fly from Seattle/Tacoma Intl to Boston Logan Intl for the best Seattle/Tacoma Intl - Boston Logan Intl flight prices

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

You are more likely to see cheaper flights to Boston from Seattle when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $378 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Boston from Seattle for as low as $367 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Boston Logan Intl flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Boston Logan Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to Boston flight prices changed over time?

As of April 2025, prices for Seattle to Boston flights are approximately 4% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Boston

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Boston according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Boston (SEA to BOS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Boston

Best Price Found

$113

Fastest flight time

5h 14m

Direct flights

Every day

Airports in Boston

1 airport
The best one-way flight to Boston from Seattle in the past 72 hours is $113. The best round-trip flight deal from Seattle to Boston found on momondo in the last 72 hours is $224.
The fastest flight from Seattle to Boston takes 5h 14m
Direct flights go from Seattle to Boston every day.
There is 1 airport near Boston: Boston Logan Intl (BOS)

  • How far is Seattle/Tacoma Intl to Boston Logan Intl by plane?

    Boston Logan Intl is 2484.0 mi away from Seattle/Tacoma Intl. A reasonable flight in good conditions will take 5h 14m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Boston Logan Intl Airport.

  • What documentation or ID do you need to fly to Boston Logan Intl Airport?

    The travel and health documents required for your trip to Boston Logan Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Boston Logan Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Seattle to Boston?

  • What is the most popular airline from Seattle to Boston?


Best airlines flying from Seattle to Boston

Compare and see reviews for airlines that fly from Seattle to Boston with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $108Free CancellationRating
7.9
2,347 reviews
Search Hawaiian Airlines flights
JetBluePriceFrom $141Free CancellationRating
7.3
2,920 reviews
Search JetBlue flights
Spirit AirlinesPriceFrom $145Free CancellationRating
6.3
7,890 reviews
Search Spirit Airlines flights
Sun Country AirPriceFrom $176Free CancellationRating
6.9
349 reviews
Search Sun Country Air flights
DeltaPriceFrom $183Free CancellationRating
8.0
7,897 reviews
Search Delta flights
Alaska AirlinesPriceFrom $225Free CancellationRating
8.0
9,833 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $237Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $238Free CancellationRating
7.4
8,619 reviews
Search United Airlines flights
SouthwestPriceFrom $356Free CancellationRating
8.0
4,274 reviews
Search Southwest flights
  • Delta Flights From Seattle to Boston

    The lowest priced Delta flight from Seattle to Boston from the last 72 hours was $183. Generally, Delta has 10 flights on this route every week with an average price of $412. Delta is rated 8.0/10 by our users.

  • Alaska Airlines Flights From Seattle to Boston

    The best Alaska Airlines deal for Seattle to Boston flight tickets found on momondo in the last 72 hours was $225, round-trip. It should be noted that an average Alaska Airlines flight deal for this route in this time was higher, at $486 round-trip. Alaska Airlines operates 13 flights out of Seattle into Boston in an average week, so prices vary by time and availability. 9,833 Alaska Airlines reviews by users on momondo have scored the airline at 8.0/10.


Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Hampton Beach
Salem
Ogunquit
Hampton
Old Orchard Beach
Nashua
Cambridge
Plymouth
Brockton
York Beach
Laconia
Concord
Everett
Warwick
Middletown
Wells
Revere
Kennebunkport
Gloucester
Narragansett

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Boston?

It is quick and easy to find Seattle to Boston flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Boston that suits you.

Can I find flights from Seattle to Boston with flexible booking policies on momondo?

All flight searches from Seattle to Boston on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Boston?

momondo helps you find the best flight between Seattle and Boston by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Boston right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Boston, momondo offers a useful price alert feature which will track prices for flights to Boston from Seattle and alert you when they change.


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