HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Boston

$145+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
May 10 — May 171
Sun 5/10
Sun 5/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Boston with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in September or October, booked 70 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap 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 April 10, 2026.

This Alaska Airlines deal was found by Cheapflights users on 4/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
SEA
-
BOS
Nonstop5h 33m
Alaska Airlines
Wed 5/64:33 pm
BOS
-
SEA
Nonstop6h 22m
Alaska Airlines
Deal found 4/8$237
This SmartFares deal was found by Cheapflights users on 4/5. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
Wed 6/37:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/5$249
This American Airlines deal was found by Cheapflights users on 4/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:34 pm
SEA
-
BOS
1 stop7h 56m
American Airlines
Wed 5/135:35 pm
BOS
-
SEA
1 stop10h 01m
American Airlines
Deal found 4/8$255
This Southwest deal was found by Cheapflights users on 4/8. 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 5/61:25 pm
SEA
-
BOS
1 stop7h 40m
Southwest
Wed 5/132:25 pm
BOS
-
SEA
2 stops12h 10m
Southwest
Deal found 4/8$260
This Cheapflightsfares deal was found by Cheapflights users on 4/6. 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 5/2011:30 am
SEA
-
BOS
Nonstop5h 37m
JetBlue
Wed 5/277:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/6$262
This KAYAK deal was found by Cheapflights users on 4/6. 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.
Sat 5/2311:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
Wed 6/37:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/6$265
This CheapOair deal was found by Cheapflights users on 4/8. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/63:21 pm
SEA
-
BOS
Nonstop5h 38m
Alaska Airlines
Wed 5/136:40 pm
BOS
-
SEA
1 stop17h 45m
Alaska Airlines
Deal found 4/8$266
This KAYAK deal was found by Cheapflights users on 4/5. 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.
Sat 5/2311:35 am
SEA
-
BOS
Nonstop5h 39m
JetBlue
Tue 6/27:00 am
BOS
-
SEA
Nonstop6h 17m
JetBlue
Deal found 4/5$267
This Southwest deal was found by Cheapflights users on 4/7. 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 5/59:20 am
SEA
-
BOS
2 stops10h 20m
Southwest
Tue 5/122:25 pm
BOS
-
SEA
2 stops12h 30m
Southwest
Deal found 4/7$273

Find 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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$237
(Alaska Airlines)

One-way from

$145
(KAYAK)

Popular in

December

Cheapest in

September

Average price

$437

Good round-trip deal

$359 or less

Good one-way deal

$209 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
Search Deals
From Seattle/Tacoma Intl to Boston Logan Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Boston Logan Intl.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Boston Logan Intl.
Search Deals

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 April 10, 2026.
Use the filters below to find and compare flights from Seattle to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/6

11:45 pm-12:40 pm

1 stop9h 55m

Boston Logan Intl

Wed 5/13

2:25 pm-12:10 am

1 stop12h 45m

$268

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 5/16

11:00 pm-7:35 am

Nonstop5h 35m

Boston Logan Intl

Sat 5/23

5:20 pm-8:33 pm

Nonstop6h 13m

$297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 5/26

11:00 pm-7:35 am

Nonstop5h 35m

Boston Logan Intl

Wed 6/3

7:30 pm-10:40 pm

Nonstop6h 10m

$297

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/20

4:10 pm-12:40 am

Nonstop5h 30m

Boston Logan Intl

Thu 5/28

7:30 pm-10:40 pm

Nonstop6h 10m

$302
Quickest round-trip

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 5/1

10:35 pm-6:55 am

Nonstop5h 20m

Boston Logan Intl

Sat 5/9

7:48 am-10:55 am

Nonstop6h 07m

$352

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 5/25

7:05 am-6:20 am

1 stop20h 15m

Boston Logan Intl

Mon 6/1

6:40 pm-10:25 am

1 stop18h 45m

$362

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 5/28

5:15 am-10:20 pm

1 stop14h 05m

Boston Logan Intl

Wed 6/3

2:25 pm-10:30 pm

2 stops11h 05m

$391

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 5/5

1:07 pm-11:59 pm

1 stop7h 52m

Boston Logan Intl

Wed 5/6

4:52 pm-10:59 pm

1 stop9h 07m

$392

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Sat 5/2

10:41 pm-12:51 pm

2 stops11h 10m

Boston Logan Intl

Sat 5/23

4:15 pm-1:13 am

1 stop11h 58m

$402

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 5/4

3:21 pm-11:59 pm

Nonstop5h 38m

Boston Logan Intl

Wed 5/6

5:35 pm-11:29 pm

1 stop8h 54m

$421

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/5

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust 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.

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 April 3, 2026.

Booking 70 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, October is the cheapest month in which you can book a flight from Seattle to Boston (average of $118). Flying from Seattle to Boston in January is currently the most expensive (average of $257). 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 April 10, 2026.

Unlike in the morning, when flights are generally more expensive, you can save up to 46% on flights from Seattle to Boston by exploring options for tickets at noon.

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 April 4, 2026.

Travelers seeking maximum savings on their Seattle to Boston flight should consider departing on Saturday at noon when fares are most often at their lowest. Monday 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 Seattle to Boston?

The best insider tips for Seattle to Boston flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Boston trip
Our travel experts
Paul Rubio

Paul Rubio

Expert on BOS

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 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

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 April 10, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andHawaiian 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
7.9
Good
12,202 reviews

Comfort

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,202 reviews
Alaska Airlines
7.9
Good
12,202 reviews

Comfort

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,394 reviews
Alaska Airlines
7.9
Good
12,202 reviews

Comfort

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Hawaiian Airlines
7.8
Good
2,839 reviews
Alaska Airlines
7.9
Good
12,202 reviews

Comfort

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
JetBlue
7.2
Good
2,926 reviews
Alaska Airlines
7.9
Good
12,202 reviews

Comfort

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.1
Good
11,562 reviews
Alaska Airlines
7.9
Good
12,202 reviews

Comfort

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 11 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 16m for a nonstop flight. You can also purchase a plane ticket from 8 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, 18 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 Southwest and Delta fly from Seattle to Boston in about 5h 35m. The time it takes to get you to your destination can typically vary by up to 4h 20m. There are 2487 mi between Seattle and Boston. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $118 on this airline. Additional options worth looking into are JetBlue and Delta, starting at $135 and $152 round-trip. Hawaiian Airlines is currently priced 69% 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 American Airlines. According to our data, you can fly for as low as $98. Users have also found prices from $118 and $118 on JetBlue 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: EL AL (96%), Virgin Atlantic (90%), Air France( 89%).

  • What are the cheapest flights from Seattle to Boston?

    Looking at all options, your cheapest flight can be booked for $148. While the most popular route (Seattle/Tacoma Intl - Boston Logan Intl) can be booked for $237 on average, our data indicates $841 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, October is the cheapest month in which you can book a flight from Seattle to Boston (average of $118). Flying from Seattle to Boston in January is currently the most expensive (average of $257). 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
Medford
Cambridge
Concord
Hampton Beach
Watertown
Brockton
Seekonk
Cranston
Chelsea
Seabrook
Warwick
Peabody
York Beach
Londonderry
Swansea
Old Orchard Beach
Lincoln
Quincy
Waltham
Lowell

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 April 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$295FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$135Average$324FlexibilityNo cancel feeOn-time62%
DeltaCheapest$152Average$394FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$178Average$408FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$194Average$326FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$196Average$406FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$223Average$457FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$236Average$450FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.