Cheap flights from Boston to Seattle from $97

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Seattle departing on 9/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Alaska Airlines Logo
4:00 pm - 7:15 pmBOS-SEA
6h 15mnonstop
Alaska Airlines Logo
3:59 pm - 12:27 amSEA-BOS
5h 28mnonstop
$195Alaska Airlines
Find Deal
Wed, Sep 3 - Tue, Sep 9
Hawaiian Airlines Logo
6:55 pm - 10:08 pmBOS-SEA
6h 13mnonstop
Hawaiian Airlines Logo
11:34 pm - 8:00 amSEA-BOS
5h 26mnonstop
$198Hawaiian Airlines
Find Deal
Sat, Sep 6 - Sat, Sep 13
Delta Logo
7:25 am - 10:45 amBOS-SEA
6h 20mnonstop
Delta Logo
7:45 am - 4:24 pmSEA-BOS
5h 39mnonstop
$217Delta
Find Deal
Tue, Aug 26 - Wed, Sep 3
JetBlue Logo
7:00 am - 10:19 amBOS-SEA
6h 19mnonstop
JetBlue Logo
11:30 am - 8:03 pmSEA-BOS
5h 33mnonstop
$237JetBlue
Find Deal
Tue, Sep 16 - Fri, Sep 26
American Airlines Logo
12:33 pm - 8:09 pmBOS-SEA
10h 36m1 stop
American Airlines Logo
12:03 pm - 10:50 pmSEA-BOS
7h 47m1 stop
$240American Airlines
Find Deal
Sat, Oct 4 - Wed, Oct 8
JetBlue Logo
7:00 am - 10:20 amBOS-SEA
6h 20mnonstop
JetBlue Logo
11:30 am - 8:03 pmSEA-BOS
5h 33mnonstop
$253JetBlue
Find Deal
Fri, Aug 29 - Sun, Sep 7
United Airlines Logo
6:03 pm - 11:59 pmBOS-SEA
8h 56m1 stop
United Airlines Logo
12:20 am - 10:54 amSEA-BOS
7h 34m1 stop
$264United Airlines
Find Deal
Tue, Aug 12 - Thu, Aug 14
United Airlines Logo
4:27 pm - 10:42 pmBOS-SEA
9h 15m1 stop
United Airlines Logo
12:20 am - 10:54 amSEA-BOS
7h 34m1 stop
$265United Airlines
Find Deal
Wed, Aug 13 - Thu, Aug 14
American Airlines Logo
3:57 pm - 10:26 pmBOS-SEA
9h 29m1 stop
American Airlines Logo
12:46 am - 11:50 amSEA-BOS
8h 04m1 stop
$268American Airlines
Find Deal
Wed, Aug 20 - Mon, Aug 25
Delta Logo
7:00 am - 6:46 pmBOS-SEA
14h 46m1 stop
Delta Logo
10:05 pm - 6:30 amSEA-BOS
5h 25mnonstop
$271Delta
Find Deal
Sun, Aug 31 - Tue, Sep 9

Delta flights from Boston to Seattle

Our best Delta deals on Boston to Seattle flight tickets
Delta
Aug 26
BOS7:25 amBoston Logan Intl
6h 20m
SEA10:45 amSeattle/Tacoma Intl
Sep 3
SEA7:45 amSeattle/Tacoma Intl
5h 39m
BOS4:24 pmBoston Logan Intl
Delta
Jul 22
BOS7:25 amBoston Logan Intl
6h 19m
SEA10:44 amSeattle/Tacoma Intl
Jul 29
SEA3:50 pmSeattle/Tacoma Intl
5h 25m
BOS12:15 amBoston Logan Intl
Delta
Aug 31
BOS7:00 amBoston Logan Intl
14h 46m
1 stop
SEA6:46 pmSeattle/Tacoma Intl
Sep 9
SEA10:05 pmSeattle/Tacoma Intl
5h 25m
BOS6:30 amBoston Logan Intl

Alaska Airlines flights from Boston to Seattle

Our best Alaska Airlines deals on Boston to Seattle flight tickets
Alaska Airlines
Sep 3
BOS4:00 pmBoston Logan Intl
6h 15m
SEA7:15 pmSeattle/Tacoma Intl
Sep 9
SEA3:59 pmSeattle/Tacoma Intl
5h 28m
BOS12:27 amBoston Logan Intl
Alaska Airlines
Sep 3
BOS7:45 amBoston Logan Intl
10h 05m
1 stop
SEA2:50 pmSeattle/Tacoma Intl
Sep 9
SEA11:34 pmSeattle/Tacoma Intl
5h 26m
BOS8:00 amBoston Logan Intl
Alaska Airlines
Sep 17
BOS7:45 amBoston Logan Intl
10h 05m
1 stop
SEA2:50 pmSeattle/Tacoma Intl
Sep 27
SEA3:59 pmSeattle/Tacoma Intl
5h 28m
BOS12:27 amBoston Logan Intl

See travel insights to Seattle from

How to get the cheapest flight ticket from Boston to Seattle

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 typical price of a round-trip flight between Boston and Seattle?

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Boston to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $236. If you don’t want to visit Seattle in January, then you should wait until March to fly from Boston, when ticket prices are also cheap, with an average price of $279.

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

On average, the least expensive day to fly to Seattle from Boston is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $404. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $530.

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

Flying to Seattle from Boston in the evening is the least expensive time of day to depart. momondo users have found prices as low as $334 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $470. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Seattle from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $345 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Boston for as low as $317 on momondo.

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

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

How have Boston to Seattle flight prices changed over time?

As of July 2025, prices for Boston to Seattle flights are approximately 2% more expensive when compared to flights at the same time last year.

When to book flights from Boston to Seattle

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

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

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

Best Price Found

$97

Fastest flight time

6h 10m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Boston in the past 72 hours is $97. The best round-trip flight deal from Boston to Seattle found on momondo in the last 72 hours is $195.
The fastest flight from Boston to Seattle takes 6h 10m
Direct flights go from Boston to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    The straight-line distance from Boston Logan Intl to Seattle/Tacoma Intl is 2484.0 mi. Flights usually cover this in 6h 10m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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


Best airlines flying from Boston to Seattle

Compare and see reviews for airlines that fly from Boston to Seattle with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $138Free CancellationRating
7.3
2,909 reviews
Search JetBlue flights
Hawaiian AirlinesPriceFrom $152Free CancellationRating
7.8
2,580 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $159Free CancellationRating
8.0
7,957 reviews
Search Delta flights
Sun Country AirPriceFrom $173Free CancellationRating
6.9
334 reviews
Search Sun Country Air flights
Spirit AirlinesPriceFrom $195Free CancellationRating
6.3
8,042 reviews
Search Spirit Airlines flights
Alaska AirlinesPriceFrom $225Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $227Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $228Free CancellationRating
7.4
8,863 reviews
Search United Airlines flights
SouthwestPriceFrom $282Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
  • Delta Flights From Boston to Seattle

    Delta flies from Boston to Seattle around 19 times per week, with 7,957 momondo users rating the airline 8.0/10. The cheapest Delta deal from Boston to Seattle in the last 72 hours was $159 (round-trip), much lower than the average airfare cost of $368 for Delta flights on this route.

  • Alaska Airlines Flights From Boston to Seattle

    The best Alaska Airlines deal for Boston to Seattle 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 $424 round-trip. Alaska Airlines operates 16 flights out of Boston into Seattle in an average week, so prices vary by time and availability. 10,000 Alaska Airlines reviews by users on momondo have scored the airline at 8.0/10.


Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Lynnwood
Puyallup
Marysville
Tukwila
Kirkland
Shoreline
Lakewood
Fife
Cle Elum
Centralia
Westport
Redmond

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to Seattle. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Boston to Seattle flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Boston.

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

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


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1 adult
Mon 7/21
Mon 7/28

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