£106 Cheap Flights from Seattle (SEA) to Boston (BOS)

View £106 flight on Wed, 10 Jun 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £106 for one-way flights and £191 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 8 Jun - Mon, 15 Jun
SEA
Seattle
BOS
Boston
£191 Return, found 2 days ago
£191
Return
found 2 days ago
Select Alaska Airlines flight, departing Mon, 8 Jun from Seattle to Boston, returning Mon, 15 Jun, priced at £191 found 2 days ago
American Airlines
Wed, 27 May - Tue, 2 Jun
SEA
Seattle
BOS
Boston
£212 Return, found 4 days ago
£212
Return
found 4 days ago
Select American Airlines flight, departing Wed, 27 May from Seattle to Boston, returning Tue, 2 Jun, priced at £212 found 4 days ago
JetBlue Airways
Sat, 30 May - Tue, 2 Jun
SEA
Seattle
BOS
Boston
£212 Return, found 6 days ago
£212
Return
found 6 days ago
Select JetBlue Airways flight, departing Sat, 30 May from Seattle to Boston, returning Tue, 2 Jun, priced at £212 found 6 days ago
Delta
Wed, 27 May - Tue, 2 Jun
SEA
Seattle
BOS
Boston
£215 Return, found 4 days ago
£215
Return
found 4 days ago
Select Delta flight, departing Wed, 27 May from Seattle to Boston, returning Tue, 2 Jun, priced at £215 found 4 days ago
Alaska Airlines
Mon, 8 Jun - Mon, 15 Jun
SEA
Seattle
BOS
Boston
£216 Return, found 2 days ago
£216
Return
found 2 days ago
Select Alaska Airlines flight, departing Mon, 8 Jun from Seattle to Boston, returning Mon, 15 Jun, priced at £216 found 2 days ago
Alaska Airlines
Wed, 3 Jun - Wed, 10 Jun
SEA
Seattle
BOS
Boston
£219 Return, found 5 days ago
£219
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 3 Jun from Seattle to Boston, returning Wed, 10 Jun, priced at £219 found 5 days ago
American Airlines
Wed, 27 May - Tue, 2 Jun
SEA
Seattle
BOS
Boston
£219 Return, found 4 days ago
£219
Return
found 4 days ago
Select American Airlines flight, departing Wed, 27 May from Seattle to Boston, returning Tue, 2 Jun, priced at £219 found 4 days ago
Alaska Airlines
Wed, 27 May - Sat, 30 May
SEA
Seattle
BOS
Boston
£223 Return, found 4 days ago
£223
Return
found 4 days ago
Select Alaska Airlines flight, departing Wed, 27 May from Seattle to Boston, returning Sat, 30 May, priced at £223 found 4 days ago
JetBlue Airways
Wed, 27 May - Tue, 2 Jun
SEA
Seattle
BOS
Boston
£223 Return, found 4 days ago
£223
Return
found 4 days ago
Select JetBlue Airways flight, departing Wed, 27 May from Seattle to Boston, returning Tue, 2 Jun, priced at £223 found 4 days ago
United
Wed, 27 May - Tue, 2 Jun
SEA
Seattle
BOS
Boston
£293 Return, found 4 days ago
£293
Return
found 4 days ago
Select United flight, departing Wed, 27 May from Seattle to Boston, returning Tue, 2 Jun, priced at £293 found 4 days 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 centre is 7 minutes. Flights from £267
BOS
Logan Intl.
CheapestClosest
Average driving time to city centre7 min
Flights from £267

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

May is typically the cheapest month to fly

From £149 - £254 per traveller.

Frequently asked questions

How much is a flight from SEA to Logan Intl. Airport (BOS)?
If you're travelling from Sea-Tac Airport to BOS, round-trip flights start from £191. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't wait around. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to BOS?
We get that your situation can change unexpectedly, so we've made it as hassle-free as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Logan Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Logan Intl. Airport?
With around 4,000 kilometres separating Sea-Tac Airport and Logan Intl. Airport, your flight will be a long one. Pack wisely to make your time in the air more comfortable. Simple things like an eye mask and a quality neck pillow can make a massive difference.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport?
A popular airline that operates on the route from SEA to Logan Intl. Airport (BOS) is Alaska Airlines (AS). It offers 117 flights a month. Like some more options? Check out the airfares with Delta Air Lines (DL). This carrier offers 78 monthly flights between these airports.
Are Sea-Tac Airport to BOS flight tickets cheaper when they're purchased at the last minute?
It is possible to nab great last-minute deals from Sea-Tac Airport to BOS, but there's no guarantee. As many airlines advertise prices up to a year in advance, it's worth keeping an eye on fares early and being ready to pounce when you spot a bargain. Expedia compares air carrier prices and updates flight deals all the time, so you can feel confident knowing you're always getting the latest offers.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.) cost?
One-way flights typically cost between £309 and £1,498 and return flights often range between £589 and £2,203. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
Enter SEA to BOS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
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 - Tacoma Intl. (SEA) to Logan Intl. (BOS) will differ from traveller to traveller. If you like to fly early, B6 offers early morning flights. If price is the most important factor, B6 typically offers the lowest fares. DL offers the most daily flights from Seattle - Tacoma Intl. (SEA) to Logan Intl. (BOS), which is brilliant 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 5 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to Logan Intl. (BOS). For even more choice, look at flights that include layovers. You'll find around 154 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Portland Intl. (PDX), and Denver Intl. (DEN).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to Boston, MA (BOS-Logan Intl.) (BOS) typically departs at approximately 12:05 AM local time. This service is operated by American Airlines and is a seasonal offering, active in February and March. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to Logan Intl. (BOS) on a Thursday, with around 103 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, Delta Air Lines, and United Airlines. Flight schedules are consistent throughout the week, with only a slight variation in the number of flights.
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. This accounts for around 32% of total traffic. Many major carriers, including Delta Air Lines, American Airlines and United Airlines, offer flights during this window. Many travelers prefer these times because they allow for an early start to your travel day, getting you to Boston with plenty of time to settle in or begin your activities.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boston, MA (BOS-Logan Intl.)?
Direct flights from SEA to BOS usually take about 5 hours 30 minutes, traveling roughly 2,488 miles. If you opt for a connecting flight, expect to add around 2 hours 50 minutes to your journey. 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.)?
Select the "Business class" and "First class" filters when looking for SEA to BOS flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
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 - Tacoma Intl. (SEA) to Logan Intl. (BOS) typically costs between £3,668 - £4,406. You may also be able to find a cheaper business class journey between Seattle - Tacoma Intl. (SEA) to Logan Intl. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) if you opt for a connecting flight.
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 directly into Logan Intl. (BOS) Some flights may connect through major hubs like McCarran Intl. (LAS), San Francisco Intl. (SFO), 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.) flight and hotel package 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, JetBlue Airways
Return price
£190
Distance
3980 km
Average flight time
8 hours 46 mins

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