Boston

$101+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Mar 17 — Mar 241
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Find cheap flights from Seattle to Boston with Cheapflights

1. Tell us where you want to go
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The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or March, booked 87 days in advance, depart on a Friday or Wednesday and return on a Thursday

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 March 12, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$227
(Booking.com)

One-way from

$101
(Trip.com)

Popular in

July

Cheapest in

January

Average price

$282

Good round-trip deal

$237 or less

Good one-way deal

$152 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
From Seattle/Tacoma Intl to Boston Logan Intl
One-way flight from Seattle/Tacoma Intl to Boston Logan Intl
Highest demand for flights based on searches. 26% potential increase in price ($139 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Average for round-trip flights in March 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Boston Logan Intl.
Price to beat on a one-way flight from Seattle/Tacoma Intl to Boston Logan Intl.

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 March 12, 2025.

This Booking.com deal was found by Cheapflights users on 3/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/47:35 pmSEA - BOS
2 stops22h 53mSpirit Airlines
Fri 5/98:28 pmBOS - SEA
2 stops20h 57mSpirit Airlines
Deal found 3/11$227
This Expedia deal was found by Cheapflights users on 3/11. 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.
Sun 5/47:35 pmSEA - BOS
2 stops22h 53mMultiple Airlines
Fri 5/97:00 amBOS - SEA
Nonstop6h 13mMultiple Airlines
Deal found 3/11$237
This Kiwi.com deal was found by Cheapflights users on 3/11. 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.
Wed 4/23:45 pmSEA - BOS
Nonstop5h 14mHawaiian Airlines
Sat 4/59:30 amBOS - SEA
Nonstop6h 25mHawaiian Airlines
Deal found 3/11$247
This JetBlue deal was found by Cheapflights users on 3/11. 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.
Wed 4/2311:55 pmSEA - BOS
Nonstop5h 25mJetBlue
Sat 4/267:18 pmBOS - SEA
Nonstop6h 27mJetBlue
Deal found 3/11$257
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/187:59 pmSEA - BOS
1 stop17h 28mAlaska Airlines
Tue 3/255:30 pmBOS - SEA
Nonstop6h 24mAlaska Airlines
Deal found 3/12$278
This American Airlines deal was found by Cheapflights users on 3/11. 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.
Tue 3/1811:14 pmSEA - BOS
1 stop10h 16mAmerican Airlines
Sat 3/225:45 pmBOS - SEA
1 stop8h 22mAmerican Airlines
Deal found 3/11$288
This United Airlines deal was found by Cheapflights users on 3/11. 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 4/38:50 amSEA - BOS
1 stop8h 05mUnited Airlines
Mon 4/74:32 pmBOS - SEA
1 stop8h 44mUnited Airlines
Deal found 3/11$294
This Delta deal was found by Cheapflights users on 3/11. 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.
Wed 4/27:30 amSEA - BOS
Nonstop5h 31mDelta
Fri 4/1111:00 amBOS - SEA
Nonstop6h 16mDelta
Deal found 3/11$298
This Southwest deal was found by Cheapflights users on 3/11. 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.
Tue 7/155:00 amSEA - BOS
2 stops10h 20mSouthwest
Tue 7/295:20 pmBOS - SEA
1 stop9h 55mSouthwest
Deal found 3/11$362

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 March 12, 2025.

Fly from

Seattle

Fly to

Boston

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 5/4

7:35 pm-9:28 pm

2 stops22h 53m

Boston Logan Intl

Fri 5/9

8:28 pm-2:25 pm

2 stops20h 57m

$227

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sun 5/4

7:35 pm-9:28 pm

2 stops22h 53m

Boston Logan Intl

Fri 5/9

7:00 am-10:13 am

Nonstop6h 13m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 4/2

3:45 pm-11:59 pm

Nonstop5h 14m

Boston Logan Intl

Sat 4/5

9:30 am-12:55 pm

Nonstop6h 25m

$247

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 4/23

11:30 pm-7:55 am

Nonstop5h 25m

Boston Logan Intl

Fri 5/2

7:00 am-10:13 am

Nonstop6h 13m

$257

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/7

9:30 pm-9:49 am

1 stop9h 19m

Boston Logan Intl

Sun 5/11

7:05 am-10:23 am

Nonstop6h 18m

$267

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 4/4

3:35 pm-11:53 pm

Nonstop5h 18m

Boston Logan Intl

Mon 4/14

5:25 pm-8:48 pm

Nonstop6h 23m

$268

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 4/2

11:59 pm-10:38 am

1 stop7h 39m

Boston Logan Intl

Sat 4/5

5:15 am-12:33 pm

1 stop10h 18m

$278

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 4/3

8:50 am-7:55 pm

1 stop8h 05m

Boston Logan Intl

Mon 4/7

4:32 pm-10:16 pm

1 stop8h 44m

$294

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 7/15

5:00 am-6:20 pm

2 stops10h 20m

Boston Logan Intl

Tue 7/29

5:20 pm-12:15 am

1 stop9h 55m

$362

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 3/31

10:29 am-12:25 am

1 stop10h 56m

$101

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 20 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
FareScanPrice Accuracy-Trust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
FlightnetworkPrice Accuracy-Trust 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 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.

The best insider tips for Seattle to Boston flights

Find out what our experts recommend to make the most of your Seattle to Boston trip
Airports
SEA

Use SEA Spot Saver for free security screening appointments, reducing wait times without TSA PreCheck or CLEAR.

Read more about SEAby Brandon Schultz
BOS

Take the MBTA Silver Line for a free ride from BOS to downtown Boston's South Station.

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

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.

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 March 7, 2025.

Booking 87 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 March 12, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 26% 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 March 9, 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. 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 March 12, 2025.

The most flights from SEA to BOS are scheduled on a Monday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 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 March 12, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Seattle to Boston. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

8.0
Very good

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Comfort

8.1

Food

7.1

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 21 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 10 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

  • How popular is this Seattle to Boston flight route?

  • 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 $227 on this airline. Additional options worth looking into are Hawaiian Airlines and Delta, starting at $247 and $257 round-trip. Spirit Airlines is currently priced 40% 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 Frontier. According to our data, you can fly for as low as $101. Users have also found prices from $107 and $129 on Spirit Airlines and Hawaiian 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: Condor (100%), Qatar Airways (94%), EL AL( 92%).

  • 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 $254 on average our data indicates $749 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Warwick
Marlborough
Waltham
Cambridge
Framingham
Chestnut Hill
Seekonk
Randolph
Brockton
Lowell
West Yarmouth
Woburn
Somerville
Saco
Burlington
Salem
Chelsea
Seabrook
Brookline
Fall River

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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 March 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$108Average$337FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$138Average$397FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$145Average$277FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$176Average$380FlexibilityNo cancel feeOn-time83%
DeltaCheapest$179Average$419FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$223Average$483FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$228Average$405FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$236Average$414FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$411Average$476FlexibilityNo cancel feeOn-time63%
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