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$119+ 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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in January or February, booked 82 days in advance, depart on a Friday 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 November 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

July

Cheapest in

January

Round-trip from

$194
(Kiwi.com)

One-way from

$119
(Alaska Airlines)
Provider with most accurate pricing for Boston Logan Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Seattle/Tacoma Intl flights.
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High demand for flights, 30% potential price rise
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Best time to find cheap flights, 39% potential price drop
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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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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 November 20, 2024.

This Kiwi.com deal was found by Cheapflights users on 11/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/77:00 amBOS - SEA
Nonstop6h 37mAlaska Airlines
Fri 12/133:40 pmSEA - BOS
Nonstop5h 19mAlaska Airlines
Deal found 11/20$194
This JetBlue deal was found by Cheapflights users on 11/19. 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.
Mon 12/96:29 amBOS - SEA
Nonstop6h 21mJetBlue
Wed 12/1111:00 amSEA - BOS
Nonstop5h 20mJetBlue
Deal found 11/19$197
This Delta deal was found by Cheapflights users on 11/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/77:00 amBOS - SEA
Nonstop6h 45mDelta
Fri 12/1311:28 pmSEA - BOS
Nonstop5h 32mDelta
Deal found 11/20$198
This Expedia deal was found by Cheapflights users on 11/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/267:07 amBOS - SEA
Nonstop6h 27mMultiple Airlines
Tue 12/35:28 pmSEA - BOS
1 stop8h 50mMultiple Airlines
Deal found 11/18$239
This American Airlines deal was found by Cheapflights users on 11/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/72:20 pmBOS - SEA
1 stop11h 49mAmerican Airlines
Sun 12/812:15 amSEA - BOS
1 stop8h 12mAmerican Airlines
Deal found 11/20$256
This United Airlines deal was found by Cheapflights users on 11/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/167:18 amBOS - SEA
1 stop9h 39mUnited Airlines
Thu 1/211:51 pmSEA - BOS
1 stop9h 55mUnited Airlines
Deal found 11/19$261
This Mytrip deal was found by Cheapflights users on 11/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/52:27 pmBOS - SEA
2 stops24h 28mSpirit Airlines
Mon 12/912:50 pmSEA - BOS
2 stops19h 35mSpirit Airlines
Deal found 11/19$290
This Sun Country Air deal was found by Cheapflights users on 11/19. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/611:37 amBOS - SEA
1 stop8h 51mSun Country Air
Fri 12/136:39 pmSEA - BOS
1 stop13h 02mSun Country Air
Deal found 11/19$370

Find flights from Boston to Seattle within your budget

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

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Any airport

Route

Depart

Return

Price

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 12/7

7:00 am-10:37 am

Nonstop6h 37m

Seattle/Tacoma Intl

Fri 12/13

3:40 pm-11:59 pm

Nonstop5h 19m

$194

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 12/9

6:29 am-9:50 am

Nonstop6h 21m

Seattle/Tacoma Intl

Wed 12/11

11:00 am-7:20 pm

Nonstop5h 20m

$197

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 12/7

7:00 am-10:45 am

Nonstop6h 45m

Seattle/Tacoma Intl

Fri 12/13

11:28 pm-8:00 am

Nonstop5h 32m

$198

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 1/8

5:20 am-12:41 pm

1 stop10h 21m

Seattle/Tacoma Intl

Wed 1/8

12:45 am-1:35 pm

1 stop9h 50m

$216

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 12/9

7:54 pm-11:31 pm

Nonstop6h 37m

Seattle/Tacoma Intl

Tue 12/17

4:00 pm-12:34 pm

2 stops17h 34m

$258

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Thu 1/9

3:14 pm-11:09 pm

1 stop10h 55m

Seattle/Tacoma Intl

Tue 1/14

7:00 am-11:59 pm

2 stops13h 59m

$261

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 5/7

6:00 am-11:10 pm

2 stops20h 10m

Seattle/Tacoma Intl

Mon 5/12

6:00 am-11:29 pm

2 stops14h 29m

$280

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 4/21

11:31 am-5:19 pm

1 stop8h 48m

Seattle/Tacoma Intl

Fri 4/25

6:00 pm-10:35 am

1 stop13h 35m

$335

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 11/26

7:07 am-10:34 am

Nonstop6h 27m

$119

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 1/20

7:20 am-2:56 pm

1 stop10h 36m

$128

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 18 results
1
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Compare providers for flights from Boston to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Seattle in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Boston to Seattle

Get recent, data-driven insights about flights from Boston to Seattle including ideal travel times, pricing trends, and more.

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 November 15, 2024.

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 82 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 July is currently the most expensive (average of $411). 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 November 20, 2024.

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 November 18, 2024.

Travelers seeking maximum savings on their Boston to Seattle flight should consider departing on Monday 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.

Weekly flight availability from Boston to Seattle

Explore weekly flight availability from Boston to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 20, 2024.

The most flights from BOS to SEA are scheduled on a Wednesday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 November 20, 2024.
To help decide which airline to fly from Boston to Seattle, see what other customers have to say about Alaska Airlines, Delta and American Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

JetBlue
7.5
Good
3,394 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Comfort

8.1

Crew

8.7

Boarding

8.2

Overall

8.1

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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 15 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 09m.

  • How popular is this Boston to Seattle flight route?

    Flights from Boston Logan Intl to Seattle/Tacoma Intl have been viewed 69 times in the past calendar month.

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

    According to our current data, Alaska Airlines ($194), Delta ($198), and American Airlines ($216) offers the cheapest pricing from Boston to Seattle. These flights start at 46% 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 $119 on Alaska Airlines. Other airlines that offer cheap prices include American Airlines from $128 and Delta from $129 one-way.

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

    Consider Hainan Airlines (100%), EL AL (94%) or Air Tahiti Nui (89%) 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 $956 for a flight from Boston to Seattle. The cheapest flight overall is $118 while the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl) is currently priced at $192.

  • 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 July is currently the most expensive (average of $411). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Boston to Seattle

Discover the top 7 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$136Average$399FlexibilityNo cancel feeOn-time62%
DeltaCheapest$170Average$406FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$176Average$373FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$182Average$445FlexibilityNo cancel feeOn-time75%
Spirit AirlinesCheapest$187Average$279FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$204Average$444FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$443FlexibilityNo cancel feeOn-time69%
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