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$99+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Jan 15 — Jan 221
Wed 1/15
Wed 1/22
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or February, booked 38 days in advance, depart on a Wednesday or Friday and return on a Friday

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 January 10, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(Orbitz)

One-way from

$99
(Delta)

Popular in

July

Cheapest in

January

Average price

$217
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
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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, 26% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in January 2025
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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 January 10, 2025.

This Orbitz deal was found by Cheapflights users on 1/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/88:26 amSEA - BOS
Nonstop5h 29mMultiple Airlines
Tue 2/117:13 amBOS - SEA
2 stops12h 47mMultiple Airlines
Deal found 1/9$160
This FlightHub deal was found by Cheapflights users on 1/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/49:45 amSEA - BOS
2 stops26h 42mSpirit Airlines
Tue 2/117:13 amBOS - SEA
2 stops12h 47mSpirit Airlines
Deal found 1/9$168
This Netflights deal was found by Cheapflights users on 1/9. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/253:45 pmSEA - BOS
Nonstop5h 14mAlaska Airlines
Thu 2/276:24 pmBOS - SEA
Nonstop6h 35mAlaska Airlines
Deal found 1/9$195
This JetBlue deal was found by Cheapflights users on 1/9. 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.
Thu 1/233:20 pmSEA - BOS
Nonstop5h 10mJetBlue
Wed 1/2910:45 amBOS - SEA
Nonstop6h 25mJetBlue
Deal found 1/9$196
This Southwest deal was found by Cheapflights users on 1/8. 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.
Wed 1/227:30 amSEA - BOS
2 stops11h 10mSouthwest
Wed 2/52:05 pmBOS - SEA
1 stop11h 35mSouthwest
Deal found 1/8$222
This Delta deal was found by Cheapflights users on 1/9. 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.
Tue 2/257:45 pmSEA - BOS
2 stops12h 16mDelta
Sat 3/87:05 pmBOS - SEA
Nonstop6h 20mDelta
Deal found 1/9$235
This American Airlines deal was found by Cheapflights users on 1/9. 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.
Thu 3/1311:59 pmSEA - BOS
1 stop8h 24mAmerican Airlines
Mon 3/171:40 pmBOS - SEA
1 stop12h 27mAmerican Airlines
Deal found 1/9$305
This United Airlines deal was found by Cheapflights users on 1/9. 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.
Thu 1/165:00 amSEA - BOS
1 stop7h 48mUnited Airlines
Sun 1/198:00 amBOS - SEA
1 stop10h 45mUnited Airlines
Deal found 1/9$323
This Cheapflightsfares deal was found by Cheapflights users on 1/10. 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 6/256:40 pmSEA - BOS
1 stop12h 57mSun Country Air
Tue 7/111:34 amBOS - SEA
1 stop8h 58mSun Country Air
Deal found 1/10$378

Find flights from Seattle to Boston within your budget

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 January 10, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 2/8

8:26 am-4:55 pm

Nonstop5h 29m

Boston Logan Intl

Tue 2/11

7:13 am-5:00 pm

2 stops12h 47m

$160

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 2/4

9:45 am-3:27 pm

2 stops26h 42m

Boston Logan Intl

Tue 2/11

7:13 am-5:00 pm

2 stops12h 47m

$168

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 2/25

3:45 pm-11:59 pm

Nonstop5h 14m

Boston Logan Intl

Thu 2/27

6:24 pm-9:59 pm

Nonstop6h 35m

$195

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 1/23

3:20 pm-11:30 pm

Nonstop5h 10m

Boston Logan Intl

Wed 1/29

10:45 am-2:10 pm

Nonstop6h 25m

$196

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 1/22

7:30 am-9:40 pm

2 stops11h 10m

Boston Logan Intl

Wed 2/5

2:05 pm-10:40 pm

1 stop11h 35m

$222

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 2/25

7:45 pm-11:01 am

2 stops12h 16m

Boston Logan Intl

Sat 3/8

7:05 pm-10:25 pm

Nonstop6h 20m

$235

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 3/13

11:59 pm-11:23 am

1 stop8h 24m

Boston Logan Intl

Mon 3/17

1:40 pm-11:07 pm

1 stop12h 27m

$305

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 3/27

11:25 pm-9:48 am

1 stop7h 23m

Boston Logan Intl

Mon 3/31

4:32 pm-10:26 pm

1 stop8h 54m

$334

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 6/25

6:40 pm-10:37 am

1 stop12h 57m

Boston Logan Intl

Tue 7/1

11:34 am-5:32 pm

1 stop8h 58m

$378

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 2/5

10:29 pm-6:55 am

Nonstop5h 26m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Showing 1-10 of 17 results
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Compare providers for flights from Seattle to Boston

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 Seattle to Boston in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
AranGrantPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
FareScanPrice Accuracy3 starsTrust Score*1 star

*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 Seattle-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Boston 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 Seattle-Boston 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 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.

Travel insights for flights from Seattle to Boston

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

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 January 3, 2025.

Booking 38 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 January 10, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 22% 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 December 16, 2024.

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. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Boston

Explore weekly flight availability from Seattle to Boston. 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 January 10, 2025.

The most flights from SEA to BOS are scheduled on a Thursday (24 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in Boston by month

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

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

Temperature in Boston by month

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

If weather is an important factor for your trip to Boston, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 January 10, 2025.
Read reviews from past customers who have flown Southwest, United Airlines and JetBlue from Seattle to Boston. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,650 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,650 reviews
Southwest
8.1
Very good
4,650 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,643 reviews
Southwest
8.1
Very good
4,650 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,501 reviews
Southwest
8.1
Very good
4,650 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,191 reviews
Southwest
8.1
Very good
4,650 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,942 reviews
Southwest
8.1
Very good
4,650 reviews

Boarding

8.2

Crew

8.7

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 18 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 10m 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, 34 users have taken a look at flights from Seattle/Tacoma Intl to Boston Logan Intl.

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

    Our cheapest airline available from Seattle to Boston is Spirit Airlines. Our recent data shows that you can find tickets from as low as $168 on this airline. Additional options worth looking into are Alaska Airlines and JetBlue, starting at $195 and $196 round-trip. Spirit Airlines is currently priced 55% below the average price you’ll pay for this route.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $99. Users have also found prices from $108 and $115 on American Airlines and Spirit Airlines, respectively.

  • 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: KLM (100%), EL AL (96%), Air France( 94%).

  • What are the cheapest flights from Seattle to Boston?

    Looking at all options, your cheapest flight can be booked for $108. While the most popular route (Seattle/Tacoma Intl - Boston Logan Intl) can be booked for $194 on average our data indicates $768 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.

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Alternative routes for Seattle to Boston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Seattle to Boston

Discover the top 8 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 January 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$134Average$391FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$145Average$260FlexibilityNo cancel feeOn-time65%
DeltaCheapest$172Average$410FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$176Average$379FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$209Average$469FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$236Average$418FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$242Average$409FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$416Average$541FlexibilityNo cancel feeOn-time63%
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