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$109+ Cheap flights from Boston to Seattle (BOS - SEA)

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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in January or March, booked 31 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Boston to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Seattle (SEA). 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 September 19, 2025.

Round-trip from

$187
(Priceline)

One-way from

$109
(Southwest)

Popular in

August

Cheapest in

January

Average price

$337

Good round-trip deal

$282 or less

Good one-way deal

$181 or less
From Boston Logan Intl to Seattle/Tacoma Intl
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One-way flight from Boston Logan Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 14% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Boston Logan Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Boston Logan Intl to Seattle/Tacoma Intl.
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Find flight deals from Boston to Seattle

Cheapest flights from Boston to Seattle
Explore the most affordable flight options available from Boston to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 19, 2025.

This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/218:20 amBOS - SEA
Nonstop6h 39mJetBlue
Sat 10/251:10 pmSEA - BOS
Nonstop5h 36mJetBlue
Deal found 9/17$187
This KAYAK deal was found by Cheapflights users on 9/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Mon 11/311:10 pmSEA - BOS
Nonstop5h 19mAlaska Airlines
Deal found 9/17$189
This Vliegwinkel deal was found by Cheapflights users on 9/17. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Wed 11/193:59 pmSEA - BOS
Nonstop5h 21mHawaiian Airlines
Deal found 9/17$191
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Wed 10/297:05 amBOS - SEA
1 stop10h 41mAmerican Airlines
Wed 10/2910:54 pmSEA - BOS
1 stop10h 30mAmerican Airlines
Deal found 9/16$195
This Hawaiian Airlines deal was found by Cheapflights users on 9/18. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Sat 11/153:59 pmSEA - BOS
Nonstop5h 21mHawaiian Airlines
Deal found 9/18$197
This Cheapflightsfares deal was found by Cheapflights users on 9/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:00 amBOS - SEA
Nonstop6h 35mAlaska Airlines
Mon 11/1011:10 pmSEA - BOS
Nonstop5h 19mAlaska Airlines
Deal found 9/18$202
This American Airlines deal was found by Cheapflights users on 9/17. 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.
Wed 10/153:51 pmBOS - SEA
1 stop11h 36mAmerican Airlines
Sat 10/186:10 amSEA - BOS
1 stop7h 39mAmerican Airlines
Deal found 9/17$207
This American Airlines deal was found by Cheapflights users on 9/17. 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.
Wed 10/156:00 amBOS - SEA
1 stop8h 03mAmerican Airlines
Tue 10/2112:34 amSEA - BOS
1 stop8h 37mAmerican Airlines
Deal found 9/17$208
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Mon 11/1711:10 pmSEA - BOS
Nonstop5h 19mHawaiian Airlines
Deal found 9/17$210
This Hawaiian Airlines deal was found by Cheapflights users on 9/17. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Mon 11/311:10 pmSEA - BOS
Nonstop5h 19mHawaiian Airlines
Deal found 9/17$212
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:00 amBOS - SEA
Nonstop6h 35mHawaiian Airlines
Sun 11/163:59 pmSEA - BOS
Nonstop5h 21mHawaiian Airlines
Deal found 9/17$214

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Seattle 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 September 19, 2025.
Use the filters below to find and compare flights from Boston to Seattle that are best for you.

Fly from

Boston

Fly to

Seattle

Route

Depart

Return

Price

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 11/14

9:00 am-12:35 pm

Nonstop6h 35m

Seattle/Tacoma Intl

Mon 11/17

11:10 pm-7:29 am

Nonstop5h 19m

$207

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 10/30

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Mon 11/3

3:59 pm-12:20 am

Nonstop5h 21m

$207

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 10/1

6:18 pm-12:59 am

1 stop9h 41m

Seattle/Tacoma Intl

Tue 10/7

1:57 pm-12:50 am

1 stop7h 53m

$237

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 12/10

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Sun 12/14

3:38 pm-11:59 pm

Nonstop5h 21m

$237

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 10/1

8:23 pm-8:07 am

1 stop14h 44m

Seattle/Tacoma Intl

Sat 10/4

3:35 pm-11:59 pm

Nonstop5h 24m

$247

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 12/6

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Sat 12/13

8:29 pm-3:37 pm

1 stop16h 08m

$247

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 12/10

4:24 pm-9:33 am

1 stop20h 09m

Seattle/Tacoma Intl

Sun 12/14

11:21 pm-7:40 am

Nonstop5h 19m

$247

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 10/23

7:20 am-10:45 am

Nonstop6h 25m

Seattle/Tacoma Intl

Fri 10/31

10:05 pm-6:35 am

Nonstop5h 30m

$249

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 11/7

6:20 pm-12:35 am

1 stop9h 15m

Seattle/Tacoma Intl

Wed 11/12

6:35 am-9:35 pm

1 stop12h 00m

$250

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 11/1

7:00 am-10:35 am

Nonstop6h 35m

Seattle/Tacoma Intl

Fri 11/7

9:32 pm-3:41 pm

1 stop15h 09m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/18

Showing 1-10 of 23 results
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The best insider tips for Boston to Seattle 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 Boston to Seattle trip
Airports
BOS

Use the FlyLogan App to pre-order food and save time at BOS. Most eateries participate, making it a convenient option.

Read more about BOSby Paul Rubio
SEA

Take the Link light rail from SEA to downtown Seattle. It's affordable, runs every 10 minutes, and takes less than 40 minutes.

Read more about SEAby Brandon Schultz
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 Boston to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Boston 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 Boston to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to Seattle. Price data was last updated on September 12, 2025.

The price you pay for your flight from Boston to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 31 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Boston to Seattle (average of $238). Flying from Boston to Seattle in June is currently the most expensive (average of $387). 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 BOS to SEA?

Find hourly flight availability from Boston to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 19, 2025.

One of the essential ways to save on airfare from Boston to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 30% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Boston to Seattle. Price data was last updated on September 14, 2025.

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

How much does it cost to fly round-trip from Boston to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated September 19, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Boston to Seattle 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

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,732 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
JetBlue
7.2
Good
2,911 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

Related info for your journey

Find useful and relevant information for your journey from Boston to Seattle. 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 Boston to Seattle?

    You will need to book a flight from Boston Logan Intl to Seattle/Tacoma Intl if you want to fly from Boston to Seattle. At least 8 different airlines have flights from Logan Intl (BOS) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 24 flights to Seattle from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SEA to be around 6h 13m.

  • How popular is this Boston to Seattle flight route?

    Flights from Boston Logan Intl to Seattle/Tacoma Intl have been viewed 44 times in the past calendar month.

  • How long is the flight from Boston to Seattle?

    Departing from Boston to Seattle will take you 6h 35m. The distance between Boston and Seattle is about 2487 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, JetBlue ($133), Hawaiian Airlines ($142), and Delta ($151) offers the cheapest pricing from Boston to Seattle. These flights start at 61% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Boston to Seattle one-way?

    One-way options have recently been found by users for as low as $109 on Hawaiian Airlines. Other airlines that offer cheap prices include Delta from $114 and United Airlines from $114 one-way.

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

    Consider LATAM Airlines (90%), Delta (86%) or Virgin Atlantic (86%) when booking your flight. These represent the most reliable airlines when flying from Boston to Seattle.

  • What are the cheapest flights from Boston to Seattle?

    On average you can expect to pay $934 for a flight from Boston to Seattle. The cheapest flight overall is $99 while the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl) is currently priced at $187.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Seattle 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 Boston to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Boston to Seattle (average of $238). Flying from Boston to Seattle in June is currently the most expensive (average of $387). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from Boston to Seattle

Discover the top 8 airlines that operate flights from Boston to Seattle. 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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$133Average$324FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$142Average$361FlexibilityNo cancel feeOn-time85%
DeltaCheapest$151Average$368FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$167Average$363FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$217Average$418FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$219Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$366FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$259Average$401FlexibilityNo cancel feeOn-time63%

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