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$132+ Cheap flights from Seattle to Boston (SEA - BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
ago. 26 — sep. 21
mar. 8/26
mar. 9/2
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or March, booked 52 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated agosto 21, 2025.

Round-trip from

$187
(JetBlue)

One-way from

$132
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$437

Good round-trip deal

$252 or less

Good one-way deal

$203 or less
From Seattle/Tacoma Intl to Boston Logan Intl
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One-way flight from Seattle/Tacoma Intl to Boston Logan Intl
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High demand for flights, 6% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Boston Logan Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Boston Logan Intl.
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Find flight deals from Seattle to Boston

Cheapest flights from Seattle to Boston
Explore the most affordable flight options available from Seattle to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 21, 2025.

This JetBlue deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/2611:30 amSEA - BOS
Nonstop5h 53mJetBlue
mar. 10/78:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/19$187
This Trip.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1211:30 amSEA - BOS
Nonstop5h 56mJetBlue
mar. 9/167:00 amBOS - SEA
Nonstop6h 19mJetBlue
Deal found 8/20$193
This JetBlue deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/1611:30 amSEA - BOS
Nonstop5h 56mJetBlue
sáb. 9/277:00 amBOS - SEA
Nonstop6h 19mJetBlue
Deal found 8/21$197
This lastminute.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/61:10 pmSEA - BOS
Nonstop5h 36mJetBlue
mié. 10/158:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/18$200
This Trip.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/71:10 pmSEA - BOS
Nonstop5h 36mJetBlue
mié. 10/158:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/19$203
This American Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/512:19 pmSEA - BOS
1 stop8h 25mAmerican Airlines
sáb. 9/132:40 pmBOS - SEA
1 stop8h 29mAmerican Airlines
Deal found 8/19$207
This JetBlue deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/311:30 amSEA - BOS
Nonstop5h 53mJetBlue
jue. 10/98:20 amBOS - SEA
Nonstop6h 39mJetBlue
Deal found 8/20$208
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/267:13 pmSEA - BOS
1 stop7h 43mUnited Airlines
mar. 11/118:00 amBOS - SEA
1 stop11h 15mUnited Airlines
Deal found 8/20$212
This JetBlue deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/1511:30 amSEA - BOS
Nonstop5h 53mJetBlue
sáb. 9/277:00 amBOS - SEA
Nonstop6h 19mJetBlue
Deal found 8/21$217
This Southwest deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/2211:10 pmSEA - BOS
1 stop14h 15mSouthwest
vie. 9/266:30 pmBOS - SEA
1 stop8h 35mSouthwest
Deal found 8/21$222
This Flysmarter deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/2711:30 amSEA - BOS
Nonstop5h 53mJetBlue
sáb. 10/47:00 amBOS - SEA
Nonstop6h 19mJetBlue
Deal found 8/20$226

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 21, 2025.
Use the filters below to find and compare flights from Seattle to Boston that are best for you.

Fly from

Seattle

Fly to

Boston

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

sáb. 9/13

11:30 am-8:23 pm

Nonstop5h 53m

Boston Logan Intl

dom. 9/21

7:00 am-10:19 am

Nonstop6h 19m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

mié. 10/29

3:59 pm-12:20 am

Nonstop5h 21m

Boston Logan Intl

sáb. 11/1

7:00 am-10:35 am

Nonstop6h 35m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

sáb. 9/13

11:30 am-8:23 pm

Nonstop5h 53m

Boston Logan Intl

vie. 9/26

7:00 am-10:19 am

Nonstop6h 19m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

jue. 11/6

3:59 pm-12:20 am

Nonstop5h 21m

Boston Logan Intl

mar. 11/11

7:00 am-10:35 am

Nonstop6h 35m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

mar. 9/16

11:30 am-8:26 pm

Nonstop5h 56m

Boston Logan Intl

dom. 9/21

7:00 am-10:19 am

Nonstop6h 19m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

sáb. 9/20

11:30 am-8:23 pm

Nonstop5h 53m

Boston Logan Intl

vie. 9/26

7:00 am-10:19 am

Nonstop6h 19m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

lun. 10/20

1:10 pm-9:46 pm

Nonstop5h 36m

Boston Logan Intl

vie. 10/24

8:20 am-11:59 am

Nonstop6h 39m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

sáb. 9/13

11:30 am-8:23 pm

Nonstop5h 53m

Boston Logan Intl

dom. 9/14

7:00 am-10:19 am

Nonstop6h 19m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

mar. 9/16

11:30 am-8:26 pm

Nonstop5h 56m

Boston Logan Intl

vie. 9/26

7:00 am-10:19 am

Nonstop6h 19m

$187

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

sáb. 9/20

11:30 am-8:23 pm

Nonstop5h 53m

Boston Logan Intl

dom. 9/28

7:00 am-10:19 am

Nonstop6h 19m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 24 results
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The best insider tips for Seattle to Boston flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Boston trip
Airports
SEA

Plan to arrive at SEA two hours before your flight. Use SEA Spot Saver for security appointments to reduce wait times.

Read more about SEAby Brandon Schultz
BOS

Use the MBTA Silver Line for a free ride from BOS to downtown Boston, connecting with local and regional transit.

Read more about BOSby Paul Rubio
Our travel experts
Paul Rubio

Paul Rubio

Expert on BOS

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Best time to book a flight from Seattle to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Boston

How far ahead should I book a flight from Seattle to Boston?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Boston. Price data was last updated on August 8, 2025.

Booking 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Boston?

Currently, January is the cheapest month in which you can book a flight from Seattle to Boston (average of $218). Flying from Seattle to Boston in July is currently the most expensive (average of $311). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to BOS?

Find hourly flight availability from Seattle to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 21, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 21% on flights from Seattle to Boston by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Seattle to Boston?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Boston. Price data was last updated on August 17, 2025.

Travelers seeking maximum savings on their Seattle to Boston flight should consider departing on Wednesday at noon when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated agosto 21, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to Boston to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,672 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
JetBlue
7.2
Good
2,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to Boston?

    Booking a flight from Seattle/Tacoma Intl (SEA) to Boston Logan Intl (BOS) is your only option if you wish to fly from Seattle to Boston. On a typical day, there are 30 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 15m for a nonstop flight. You can also purchase a plane ticket from 9 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

  • How popular is this Seattle to Boston flight route?

    Within the past month, 11 users have taken a look at flights from Seattle/Tacoma Intl to Boston Logan Intl.

  • How long is the flight from Seattle to Boston?

    Airlines like JetBlue and Hawaiian Airlines fly from Seattle to Boston in about 5h 21m. The time it takes to get you to your destination is usually consistent. There are 2487 mi between Seattle and Boston. Most flights are nonstop.

  • What are the cheapest airlines flying from Seattle to Boston round-trip?

    Our cheapest airline available from Seattle to Boston is Hawaiian Airlines. Our recent data shows that you can find tickets from as low as $120 on this airline. Additional options worth looking into are JetBlue and Delta, starting at $132 and $153 round-trip. Hawaiian Airlines is currently priced 65% below the average price you’ll pay for this route.

  • What are the most reliable airlines from Seattle to Boston?

    Before booking your flight to Boston from Seattle, check out the most reliable airlines to get you to your destination on time: Air France (93%), Virgin Atlantic (82%), EL AL( 81%).

  • What are the cheapest flights from Seattle to Boston?

    Looking at all options, your cheapest flight can be booked for $117. While the most popular route (Seattle/Tacoma Intl - Boston Logan Intl) can be booked for $177 on average our data indicates $766 when flying from Seattle to Boston.

  • Can I find deals for flights from Seattle to Boston that include hotel bookings?

    Yes. In addition to deals on Seattle to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Boston.

  • Can I find deals for business class flights from Seattle to Boston?

    Yes. Cheapflights offers flight deals from Seattle to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Boston?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Boston (average of $218). Flying from Seattle to Boston in July is currently the most expensive (average of $311). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Cambridge
Medford
Watertown
Hampton Beach
Waltham
Seabrook
Lowell
Lincoln
Smithfield
Cranston
Chestnut Hill
Warwick
Peabody
Quincy
York Beach
Chelsea
Swansea
Saugus
Burlington
Braintree

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Boston

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Top 9 airlines flying from Seattle to Boston

Discover the top 9 airlines that operate flights from Seattle to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$120Average$366FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$132Average$327FlexibilityNo cancel feeOn-time62%
DeltaCheapest$153Average$375FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$175Average$301FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$216Average$393FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$223Average$382FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$228Average$453FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$228Average$358FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$281Average$346FlexibilityNo cancel feeOn-time63%

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