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Cheap flights from Boston to Seattle from $126

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 9/18. 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
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Easily compare round-trip flights from Boston to Seattle

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Boston to Seattle by changing tabs
Spirit Airlines
May 8
BOS4:08 pmBoston Logan Intl
19h 37m
2 stops
SEA8:45 amSeattle/Tacoma Intl
May 13
SEA9:40 pmSeattle/Tacoma Intl
14h 33m
2 stops
BOS3:13 pmBoston Logan Intl
United Airlines
May 8
BOS9:00 amBoston Logan Intl
9h 28m
1 stop
SEA3:28 pmSeattle/Tacoma Intl
May 15
SEA1:00 pmSeattle/Tacoma Intl
7h 38m
1 stop
BOS11:38 pmBoston Logan Intl
American Airlines
May 8
BOS1:04 pmBoston Logan Intl
11h 52m
1 stop
SEA9:56 pmSeattle/Tacoma Intl
May 13
SEA11:43 pmSeattle/Tacoma Intl
9h 31m
1 stop
BOS12:14 pmBoston Logan Intl
Multiple Airlines
May 8
BOS4:08 pmBoston Logan Intl
19h 37m
2 stops
SEA8:45 amSeattle/Tacoma Intl
May 10
SEA5:15 pmSeattle/Tacoma Intl
21h 31m
2 stops
BOS5:46 pmBoston Logan Intl
JetBlue
May 7
BOS4:25 pmBoston Logan Intl
6h 05m
SEA7:30 pmSeattle/Tacoma Intl
May 8
SEA8:40 pmSeattle/Tacoma Intl
5h 29m
BOS5:09 amBoston Logan Intl
Delta
May 7
BOS6:30 amBoston Logan Intl
6h 17m
SEA9:47 amSeattle/Tacoma Intl
May 7
SEA10:31 pmSeattle/Tacoma Intl
5h 28m
BOS6:59 amBoston Logan Intl

Find the cheapest one-way flights from Boston to Seattle

If you're looking for one-way flights from Boston to Seattle, view some of our deals below provided by American Airlines, JetBlue and Spirit Airlines
American Airlines
Sep 18
BOS8:00 amBoston Logan Intl
11h 33m
1 stop
SEA4:33 pmSeattle/Tacoma Intl
Spirit Airlines
May 13
BOS2:40 pmBoston Logan Intl
21h 05m
2 stops
SEA8:45 amSeattle/Tacoma Intl
United Airlines
May 1
BOS6:01 amBoston Logan Intl
12h 22m
2 stops
SEA3:23 pmSeattle/Tacoma Intl

Search last-minute flights to Seattle from Boston

Find and compare round-trip flight prices for your last-minute flight from Boston to Seattle
United Airlines
May 2
BOS5:45 amBoston Logan Intl
8h 48m
1 stop
SEA11:33 amSeattle/Tacoma Intl
May 3
SEA1:00 pmSeattle/Tacoma Intl
7h 38m
1 stop
BOS11:38 pmBoston Logan Intl
American Airlines
May 2
BOS3:30 pmBoston Logan Intl
8h 56m
1 stop
SEA9:26 pmSeattle/Tacoma Intl
May 8
SEA12:09 pmSeattle/Tacoma Intl
9h 52m
1 stop
BOS1:01 amBoston Logan Intl
Spirit Airlines
May 3
BOS11:54 amBoston Logan Intl
23h 51m
2 stops
SEA8:45 amSeattle/Tacoma Intl
May 7
SEA9:19 pmSeattle/Tacoma Intl
14h 54m
2 stops
BOS3:13 pmBoston Logan Intl
JetBlue
May 2
BOS4:49 pmBoston Logan Intl
6h 05m
SEA7:54 pmSeattle/Tacoma Intl
May 8
SEA8:40 pmSeattle/Tacoma Intl
5h 29m
BOS5:09 amBoston Logan Intl
Multiple Airlines
Apr 30
BOS7:00 amBoston Logan Intl
6h 15m
SEA10:15 amSeattle/Tacoma Intl
May 1
SEA4:45 pmSeattle/Tacoma Intl
14h 48m
1 stop
BOS10:33 amBoston Logan Intl
Delta
May 2
BOS7:35 pmBoston Logan Intl
6h 19m
SEA10:54 pmSeattle/Tacoma Intl
May 8
SEA7:45 amSeattle/Tacoma Intl
5h 37m
BOS4:22 pmBoston Logan Intl

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
Spirit AirlinesPriceFrom $116Free CancellationRating
6.4
8,754 reviews
Search Spirit Airlines flights
JetBluePriceFrom $129Free CancellationRating
7.6
4,624 reviews
Search JetBlue flights
Alaska AirlinesPriceFrom $138Free CancellationRating
8.0
9,110 reviews
Search Alaska Airlines flights
DeltaPriceFrom $138Free CancellationRating
8.0
11,004 reviews
Search Delta flights
United AirlinesPriceFrom $138Free CancellationRating
7.4
11,255 reviews
Search United Airlines flights
Sun Country AirPriceFrom $176Free CancellationRating
7.2
663 reviews
Search Sun Country Air flights
American AirlinesPriceFrom $219Free CancellationRating
7.3
14,898 reviews
Search American Airlines flights
  • Alaska Airlines Flights From Boston to Seattle

    Alaska Airlines flies from Boston to Seattle around 14 times per week, with 9,110 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Boston to Seattle in the last 72 hours was $138 (round-trip), much lower than the average airfare cost of $378 for Alaska Airlines flights on this route.

  • Delta Flights From Boston to Seattle

    The best Delta deal for Boston to Seattle flight tickets found on momondo in the last 72 hours was $138, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $378 round-trip. Delta operates 20 flights out of Boston into Seattle in an average week, so prices vary by time and availability. 11,004 Delta reviews by users on momondo have scored the airline at 8.0/10.


JetBlue flights from Boston to Seattle

Our best JetBlue deals on Boston to Seattle flight tickets
JetBlue
May 7
BOS4:25 pmBoston Logan Intl
6h 05m
SEA7:30 pmSeattle/Tacoma Intl
May 8
SEA8:40 pmSeattle/Tacoma Intl
5h 29m
BOS5:09 amBoston Logan Intl
JetBlue
May 7
BOS5:22 pmBoston Logan Intl
8h 27m
1 stop
SEA10:49 pmSeattle/Tacoma Intl
May 8
SEA8:40 pmSeattle/Tacoma Intl
5h 29m
BOS5:09 amBoston Logan Intl
JetBlue
May 2
BOS4:49 pmBoston Logan Intl
6h 05m
SEA7:54 pmSeattle/Tacoma Intl
May 8
SEA8:40 pmSeattle/Tacoma Intl
5h 29m
BOS5:09 amBoston Logan Intl

Spirit Airlines flights from Boston to Seattle

Our best Spirit Airlines deals on Boston to Seattle flight tickets
Spirit Airlines
May 8
BOS4:08 pmBoston Logan Intl
19h 37m
2 stops
SEA8:45 amSeattle/Tacoma Intl
May 13
SEA9:40 pmSeattle/Tacoma Intl
14h 33m
2 stops
BOS3:13 pmBoston Logan Intl
Spirit Airlines
May 8
BOS4:08 pmBoston Logan Intl
19h 37m
2 stops
SEA8:45 amSeattle/Tacoma Intl
May 13
SEA9:40 pmSeattle/Tacoma Intl
14h 33m
2 stops
BOS3:13 pmBoston Logan Intl
Spirit Airlines
May 8
BOS4:08 pmBoston Logan Intl
19h 37m
2 stops
SEA8:45 amSeattle/Tacoma Intl
May 13
SEA9:40 pmSeattle/Tacoma Intl
14h 33m
2 stops
BOS3:13 pmBoston Logan Intl

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 cheapest month to fly from Boston to Seattle?

January. The cheapest time of year to fly to Seattle from Boston is January. Most expensive is June

What is the cheapest day to depart Boston for Seattle?

Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

When is the cheapest time to fly from Boston to Seattle?

In the evening. Boston to Seattle flights are approximately 34% more expensive in the morning than in the evening

What is the cheapest airline that flies to Seattle from Boston?

Spirit Airlines. Alaska Airlines, Delta, and Spirit Airlines are the most popular carriers operating from Boston to Seattle

What is the cheapest Boston to Seattle flight route?

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

How far in advance should you book Boston to Seattle flights?

27 days before. The cheapest time to buy a flight from Boston to Seattle is approximately 27 days to departure

How many flights depart from Boston to Seattle on average per day?

As of April 2024, there are 22 flights per week flying from Boston to Seattle. The most common time of day flights depart is 6:00PM, with 38% of flights taking off at noon.

How many flights depart from Boston to Seattle on average per week?

The number of flights available between Boston and Seattle is 158 per week as of April 2024. The most frequent departure day is Tuesday, with 16% of weekly flights leaving on this day.

What cabin class options are available on Boston to Seattle flights?

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

Can stopping save me money on Boston to Seattle flights?

You could potentially save up to 21% on your flight if you consider stops on a Boston to Seattle flight.

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

$126

Fastest flight time

6h 03m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Boston in the past 72 hours is $126. The best round-trip flight deal from Boston to Seattle found on momondo in the last 72 hours is $221.
The fastest flight from Boston to Seattle takes 6h 03m
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 03m, 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.


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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