What airlines fly to Boston?

Delta, JetBlue and Alaska Airlines are the top three most popular airlines that fly to Boston from Seattle according to our data. Delta is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Boston. Keep in mind that there are 8 different airlines that fly to Boston on a routine basis, so you have a few additional options to choose from.

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

15 flights are operational daily from Seattle to Boston as of November 2025. The most popular departure time for this route is 3:00PM, with 37% of flights per day taking off at noon.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Seattle to Boston flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

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

As of November 2025, 109 flights take off from Seattle and land in Boston each week. The most common flight departure day for this route is Sun, with 24% of weekly flights taking off on this day.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Boston Logan Intl?

Frontier, American Airlines, and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Boston Logan Intl

What is the most punctual flight time for Seattle to Boston flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

How often are flights from Seattle to Boston delayed?

Historically, on average around 16% of flights between Seattle and Boston have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

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?

As of November 2025, there are 8 operators available to choose from 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.

$118 Cheap Flights from Seattle to Boston in 2025/26

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11:30 am - 8:05 pmSEA-BOS

5h 35mnonstop

7:00 am - 10:20 amBOS-SEA

6h 20mnonstop

$262JetBlue

Find Deal

Fri, May 1 - Tue, May 5

11:59 pm - 2:20 pmSEA-BOS

11h 21m1 stop

7:00 am - 10:20 amBOS-SEA

6h 20mnonstop

$272JetBlue

Find Deal

Mon, May 4 - Tue, May 12

11:30 am - 8:05 pmSEA-BOS

5h 35mnonstop

1:00 pm - 8:53 pmBOS-SEA

10h 53m1 stop

$277JetBlue

Find Deal

Wed, May 6 - Sun, May 10

11:25 pm - 7:48 amSEA-BOS

5h 23mnonstop

6:44 pm - 10:17 pmBOS-SEA

6h 33mnonstop

$278Alaska Airlines

Find Deal

Mon, Jan 5 - Mon, Jan 12

3:38 pm - 11:59 pmSEA-BOS

5h 21mnonstop

6:59 pm - 10:30 pmBOS-SEA

6h 31mnonstop

$295Alaska Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

11:25 pm - 7:48 amSEA-BOS

5h 23mnonstop

6:44 pm - 10:17 pmBOS-SEA

6h 33mnonstop

$298Hawaiian Airlines

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Mon, Jan 5 - Mon, Jan 12

9:00 am - 5:20 pmSEA-BOS

5h 20mnonstop

4:24 pm - 12:12 amBOS-SEA

10h 48m1 stop

$300Alaska Airlines

Find Deal

Sat, Dec 6 - Sun, Dec 14

10:40 pm - 6:54 amSEA-BOS

5h 14mnonstop

9:02 am - 12:35 pmBOS-SEA

6h 33mnonstop

$301Alaska Airlines

Find Deal

Tue, Mar 10 - Wed, Mar 11

4:59 pm - 6:10 amSEA-BOS

10h 11m1 stop

6:44 pm - 10:17 pmBOS-SEA

6h 33mnonstop

$302Hawaiian Airlines

Find Deal

Mon, Jan 5 - Mon, Jan 12

11:25 pm - 7:48 amSEA-BOS

5h 23mnonstop

6:06 pm - 9:30 pmBOS-SEA

6h 24mnonstop

$303Alaska Airlines

Find Deal

Mon, Jan 5 - Tue, Jan 6

Sun Country Air flights from Seattle to Boston

Our best Sun Country Air deals on Seattle to Boston flight tickets

Sun Country Air

Nov 26

SEA11:59 pmSeattle/Tacoma Intl

7h 42m

1 stop

BOS10:41 amBoston Logan Intl

Dec 17

BOS11:51 amBoston Logan Intl

8h 03m

1 stop

SEA4:54 pmSeattle/Tacoma Intl

$453

Find similar

Sun Country Air

Nov 22

SEA6:30 pmSeattle/Tacoma Intl

13h 11m

1 stop

BOS10:41 amBoston Logan Intl

Nov 29

BOS11:42 amBoston Logan Intl

14h 04m

1 stop

SEA10:46 pmSeattle/Tacoma Intl

$464

Find similar

Sun Country Air

Nov 22

SEA6:30 pmSeattle/Tacoma Intl

25h 56m

1 stop

BOS11:26 pmBoston Logan Intl

Nov 24

BOS11:42 amBoston Logan Intl

25h 40m

1 stop

SEA10:22 amSeattle/Tacoma Intl

$465

Find similar

JetBlue flights from Seattle to Boston

Our best JetBlue deals on Seattle to Boston flight tickets

JetBlue

May 1

SEA11:30 amSeattle/Tacoma Intl

5h 35m

BOS8:05 pmBoston Logan Intl

May 5

BOS7:00 amBoston Logan Intl

6h 20m

SEA10:20 amSeattle/Tacoma Intl

$262

Find similar

JetBlue

May 4

SEA11:59 pmSeattle/Tacoma Intl

11h 21m

1 stop

BOS2:20 pmBoston Logan Intl

May 12

BOS7:00 amBoston Logan Intl

6h 20m

SEA10:20 amSeattle/Tacoma Intl

$272

Find similar

JetBlue

May 6

SEA11:30 amSeattle/Tacoma Intl

5h 35m

BOS8:05 pmBoston Logan Intl

May 10

BOS1:00 pmBoston Logan Intl

10h 53m

1 stop

SEA8:53 pmSeattle/Tacoma Intl

$277

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Fly from

Fly to

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 5/1

11:30 am-8:05 pm

Nonstop5h 35m

Boston Logan Intl

Tue 5/5

7:00 am-10:20 am

Nonstop6h 20m

$262

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 5/4

11:59 pm-2:20 pm

1 stop11h 21m

Boston Logan Intl

Tue 5/12

7:00 am-10:20 am

Nonstop6h 20m

$272

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/6

11:30 am-8:05 pm

Nonstop5h 35m

Boston Logan Intl

Sun 5/10

1:00 pm-8:53 pm

1 stop10h 53m

$277

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 1/5

11:25 pm-7:48 am

Nonstop5h 23m

Boston Logan Intl

Mon 1/12

6:44 pm-10:17 pm

Nonstop6h 33m

$278

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 12/5

3:38 pm-11:59 pm

Nonstop5h 21m

Boston Logan Intl

Mon 12/8

6:59 pm-10:30 pm

Nonstop6h 31m

$295

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 1/5

11:25 pm-7:48 am

Nonstop5h 23m

Boston Logan Intl

Mon 1/12

6:44 pm-10:17 pm

Nonstop6h 33m

$298

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 12/6

9:00 am-5:20 pm

Nonstop5h 20m

Boston Logan Intl

Sun 12/14

4:24 pm-12:12 am

1 stop10h 48m

$300

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 3/10

10:40 pm-6:54 am

Nonstop5h 14m

Boston Logan Intl

Wed 3/11

9:02 am-12:35 pm

Nonstop6h 33m

$301

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 1/5

4:59 pm-6:10 am

1 stop10h 11m

Boston Logan Intl

Mon 1/12

6:44 pm-10:17 pm

Nonstop6h 33m

$302

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 1/5

11:25 pm-7:48 am

Nonstop5h 23m

Boston Logan Intl

Tue 1/6

6:06 pm-9:30 pm

Nonstop6h 24m

$303

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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

Prices

Airlines

Delays

Other information

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 March instead. Flights to Boston in March, while not as cheap as those in January, still average around $276.

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

The cheapest day to depart from Seattle to Boston is on a Wednesday when prices can be found for as low as $339. 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 $417.

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 at noon. momondo users have found flights departing from Seattle to Boston at noon for as low as $303. 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 $413 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 weeks ahead of your departure date. In general, you can expect to find flights to Boston for around $353 when searching 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 $312 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 November 2025, prices for Seattle to Boston flights are approximately 9% cheaper 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	$181
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 $181. The best round-trip flight deal from Seattle to Boston found on momondo in the last 72 hours is $306.

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)

Search flight deals

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?
As of November 2025, there are 8 operators available to choose from 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?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Boston is Airbus A321neo, representing 24.30% of all bookings. The subsequent popular models are Boeing 737 at 22.27%, Boeing 737 MAX 9 at 17.61%, and Airbus A321-100/200 at 14.91%.
What is the most popular airline from Seattle to Boston?
momondo data reveals that the most frequently booked airline on the route from Seattle to Boston is Delta, representing 38% of all bookings. The subsequent popular airlines are JetBlue at 28%, Alaska Airlines at 26%, and Hawaiian Airlines at 4%.

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 Airlines	PriceFrom $118	Free Cancellation	Rating 7.8 2,809 reviews	Search Hawaiian Airlines flights
JetBlue	PriceFrom $138	Free Cancellation	Rating 7.2 2,903 reviews	Search JetBlue flights
Delta	PriceFrom $149	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
United Airlines	PriceFrom $178	Free Cancellation	Rating 7.4 9,014 reviews	Search United Airlines flights
American Airlines	PriceFrom $196	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
Sun Country Air	PriceFrom $216	Free Cancellation	Rating 6.9 334 reviews	Search Sun Country Air flights
Alaska Airlines	PriceFrom $228	Free Cancellation	Rating 8.0 11,312 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $236	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights

Alaska Airlines Flights From Seattle to Boston
The lowest priced Alaska Airlines flight from Seattle to Boston from the last 72 hours was $228. Generally, Alaska Airlines has 7 flights on this route every week with an average price of $455. Alaska Airlines is rated 8.0/10 by our users.
Delta Flights From Seattle to Boston
The best Delta deal for Seattle to Boston flight tickets found on momondo in the last 72 hours was $149, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $373 round-trip. Delta operates 16 flights out of Seattle into Boston in an average week, so prices vary by time and availability. 8,007 Delta reviews by users on momondo have scored the airline at 7.9/10.

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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.

An easier way to manage your Boston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Seattle to Boston from $136

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 1/16. 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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Our best Sun Country Air deals on Seattle to Boston flight tickets

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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?

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

The cheapest day to depart from Seattle to Boston is on a Wednesday when prices can be found for as low as $339. 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 $417.

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

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?

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 November 2025, prices for Seattle to Boston flights are approximately 9% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Boston Logan Intl?

Frontier, American Airlines, and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Boston Logan Intl

What airlines fly to Boston?

How often are flights from Seattle to Boston delayed?

Historically, on average around 16% of flights between Seattle and Boston have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

What is the most punctual flight time for Seattle to Boston flights?

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Seattle to Boston flights?

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

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

15 flights are operational daily from Seattle to Boston as of November 2025. The most popular departure time for this route is 3:00PM, with 37% of flights per day taking off at noon.

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

As of November 2025, 109 flights take off from Seattle and land in Boston each week. The most common flight departure day for this route is Sun, with 24% of weekly flights taking off on this day.

When to book flights from Seattle to Boston

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

Fastest flight time

Direct flights

Airports in Boston

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

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

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?

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

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

Alaska Airlines Flights From Seattle to Boston

Delta Flights From Seattle to Boston

Traveling to a place near Boston?

Why use momondo?

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

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

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

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

An easier way to manage your Boston trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

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