$114 Cheap Flights from Seattle (SEA) to Boston (BOS)

View $114 flight on Wed, May 6, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Logan International Airport (BOS)

Cheap Flights from Seattle to Boston (SEA-BOS)

Prices were available within the past 7 days and start at $114 for one-way flights and $232 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, May 5 - Wed, May 13
SEA
Seattle
BOS
Boston
$232 Roundtrip, found 4 hours ago
$232
Roundtrip
found 4 hours ago
Select United flight, departing Tue, May 5 from Seattle to Boston, returning Wed, May 13, priced at $232 found 4 hours ago
United
Tue, May 5 - Tue, May 12
SEA
Seattle
BOS
Boston
$233 Roundtrip, found 7 hours ago
$233
Roundtrip
found 7 hours ago
Select United flight, departing Tue, May 5 from Seattle to Boston, returning Tue, May 12, priced at $233 found 7 hours ago
Southwest Airlines
Sun, May 3 - Tue, May 5
SEA
Seattle
BOS
Boston
$237 Roundtrip, just found
$237
Roundtrip
just found
Select Southwest Airlines flight, departing Sun, May 3 from Seattle to Boston, returning Tue, May 5, priced at $237 just found
United
Mon, May 4 - Wed, May 6
SEA
Seattle
BOS
Boston
$237 Roundtrip, just found
$237
Roundtrip
just found
Select United flight, departing Mon, May 4 from Seattle to Boston, returning Wed, May 6, priced at $237 just found
American Airlines
Wed, Apr 29 - Wed, May 6
SEA
Seattle
BOS
Boston
$237 Roundtrip, found 1 hour ago
$237
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Apr 29 from Seattle to Boston, returning Wed, May 6, priced at $237 found 1 hour ago
Delta
Wed, May 27 - Sat, Jun 6
SEA
Seattle
BOS
Boston
$237 Roundtrip, just found
$237
Roundtrip
just found
Select Delta flight, departing Wed, May 27 from Seattle to Boston, returning Sat, Jun 6, priced at $237 just found
JetBlue Airways
Tue, May 19 - Wed, May 27
SEA
Seattle
BOS
Boston
$237 Roundtrip, found 4 hours ago
$237
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Tue, May 19 from Seattle to Boston, returning Wed, May 27, priced at $237 found 4 hours ago
Delta
Tue, Jun 2 - Wed, Jun 3
SEA
Seattle
BOS
Boston
$241 Roundtrip, found 20 hours ago
$241
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Jun 2 from Seattle to Boston, returning Wed, Jun 3, priced at $241 found 20 hours ago
Southwest Airlines
Wed, May 27 - Sat, Jun 6
SEA
Seattle
BOS
Boston
$242 Roundtrip, just found
$242
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, May 27 from Seattle to Boston, returning Sat, Jun 6, priced at $242 just found
American Airlines
Tue, May 12 - Wed, May 20
SEA
Seattle
BOS
Boston
$244 Roundtrip, found 4 hours ago
$244
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Tue, May 12 from Seattle to Boston, returning Wed, May 20, priced at $244 found 4 hours ago

Alternative airports near Boston

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Logan Intl. BOS. Cheapest and Closest option available. Average driving time to city center is 7 minutes. Flights from $421
BOS
Logan Intl.
CheapestClosest
Average driving time to city center7 min
Flights from $421

Find the cheapest month to fly from Seattle (SEA) to Boston (BOS)

March is typically the cheapest month to fly

From $156 - $307 per traveler.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) cost?
You can find cheap one-way flights from $114 and cheap return flights from $232 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) with Expedia. One-way flights typically cost between $175 and $1167, and return flights often range between $346 and $1799. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
The cheapest month to fly from SEA to BOS is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
Choose from 3 airlines operating direct flights from SEA to BOS:

  • Delta operates around 21 direct flights from SEA to BOS every week
  • JetBlue Airways operates around 10 direct flights from SEA to BOS every week
  • Hawaiian Airlines operates around 13 direct flights from SEA to BOS every week

What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
Alaska Airlines is one of the cheapest airlines offering nonstop flights from Seattle - Tacoma Intl. (SEA) to Logan Intl. (BOS), with round-trip tickets starting from around $505. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
The best airline to fly with from Seattle, WA (SEA) to Boston, MA (BOS) will differ from traveler to traveler. If you like to fly early, Delta offers early morning flights. If price is the most important factor, JetBlue Airways typically offers the lowest fares. American Airlines offers the most daily flights from SEA to BOS, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
There are approximately 4 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to Logan Intl. (BOS). For more options, look at flights that include layovers.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
The earliest flight from Seattle-Tacoma International (SEA) to Logan International (BOS) typically departs at 12:05 AM, operated by American Airlines. This seasonal service is available in February and March, allowing you to maximize your time in Boston. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Logan Intl. (BOS) are in the early morning, from 6am to 9am. About 29% of passengers prefer this time window. Many major carriers, including American Airlines, United Airlines, and Delta offer flights during this window. This timing works well because it allows you to arrive in Boston with a full day ahead to explore the city.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
A nonstop flight from SEA to BOS typically takes around 5 hours 30 minutes, covering approximately 2,488 miles. Connecting flights on this route usually add 2 hours 50 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
Business class seats are offered on the SEA to BOS route with American Airlines and JetBlue Airways.First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines
  • Hawaiian Airlines

How much is a business class flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
A direct, return business class ticket from Seattle (SEA) to Boston (BOS) typically costs between $1,761 - $2,412. A non-stop, one-way business class flight is usually around $882 - $1,373. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Boston from Seattle - Tacoma Intl. (SEA)?
If you're planning to travel to Boston from Seattle - Tacoma Intl. (SEA), you can fly into Logan Intl. (BOS) Some flights may connect through major hubs like Harry Reid Intl. (LAS), Denver Intl. (DEN), Sky Harbor Intl. (PHX) before reaching Boston. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) Boston Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$232
Distance
2487 mi
Average flight time
8 hours 59 mins

Book with confidence

Seattle to Boston Flights

The cheapest times to fly from Seattle to Boston

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Boston are during the month of May. You can find some of the cheapest flights from Seattle to Boston with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Boston

Sunday is one of the best days to book for cheap flights from Seattle to Boston: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Boston

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Boston in 2026. You can also book with separate airlines for your outbound and return journeys, from $114 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Boston flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Boston airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Boston Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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