US$121️ Cheap Flights from Boston to Seattle (2024)

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Boston to Seattle - Flights Starting at US$121

Book one-way or return flights from Boston to Seattle from as little as US$121. Choose from the popular airlines below and book your flight today!

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

We've found these cheap flights for you. You may book a one-way or round trip as per your needs.

We monitor flight fares to help you seize the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Cheapest airlines flights from Boston to Seattle

View airlines operating flights from Boston to Seattle. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Delta Air Lines

From US$124

Spirit Airlines

From US$124

American Airlines

From US$126

United Airlines

From US$148

Southwest Airlines

From US$163

Frontier Airlines

From US$237

Sun Country Airlines

From US$258

Jetblue Airways

From US$285

Alaska Airlines

From US$335

Hawaiian Airlines

From US$731

ANA airlines

Find more flights and airlines

Alternative Routes from Boston to Seattle

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Boston to Seattle.

Cheapest
BOS
11:00
6h 14m
Direct
SEA
14:14
General Edward Lawrence Logan International Airport - Seattle-Tacoma International Airport
Tue, Apr 30Alaska Airlines
US$335
BOS
11:00
6h 14m
Direct
SEA
14:14
General Edward Lawrence Logan International Airport - Seattle-Tacoma International Airport
Tue, Apr 30Alaska Airlines
US$335
Find More Flights

Frequently Asked Questions

When are flight tickets from Boston (BOS) to Seattle (SEA) the cheapest?
Airlines adjust prices for flights from Boston to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much do flights from Boston (BOS) to Seattle (SEA) cost?
According to Trip.com's data, the lowest price is around $463.
How long does it take to fly from Boston (BOS) to Seattle (SEA) and what is the distance?
It takes around 6 hours 17 minutes to fly from Boston (BOS) to Seattle (SEA).
What is the transportation method from the main airport to downtown in Seattle?
- The distance from Seattle-Tacoma International Airport to downtown is about 17km. It takes about 30 minutes by taxi.
What are the most popular airlines that fly from Boston (BOS) to Seattle (SEA)?
Airlines with flights from Boston (BOS) to Seattle (SEA): LATAM Airlines, Delta Air Lines, American Airlines, Jetblue Airways, Virgin Atlantic, Air Tahiti Nui, Hawaiian Airlines, Korean Air, TAP Air Portugal, Aer Lingus, Japan Airlines, Singapore Airlines and Condor Airlines.

How to find a cheap flight from Boston to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Boston to Seattle. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com

Boston to Seattle Flight Information

Cheapest nonstop flight price	$121
Cheapest round-trip ticket price	$236
Off-season for travel	December
Peak season for travel	October
Flight distance	4,005.09km
Average flight time	6 hours 17 minutes
Popular airline	Alaska Airlines