$140 Cheap Flights from Buffalo (BUF) to Seattle (SEA)

View $140 flight on Sat, Jan 17, 2026Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Buffalo to Seattle (BUF-SEA)

Prices were available within the past 7 days and start at $140 for one-way flights and $279 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Feb 17 - Wed, Feb 18
BUF
Buffalo
SEA
Seattle
$279 Roundtrip, found 2 days ago
$279
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Feb 17 from Buffalo to Seattle, returning Wed, Feb 18, priced at $279 found 2 days ago
JetBlue Airways
Wed, Apr 29 - Tue, May 12
BUF
Buffalo
SEA
Seattle
$279 Roundtrip, found 1 day ago
$279
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Wed, Apr 29 from Buffalo to Seattle, returning Tue, May 12, priced at $279 found 1 day ago
American Airlines
Tue, Feb 17 - Sat, Feb 21
BUF
Buffalo
SEA
Seattle
$281 Roundtrip, found 22 hours ago
$281
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Tue, Feb 17 from Buffalo to Seattle, returning Sat, Feb 21, priced at $281 found 22 hours ago
Delta
Mon, Nov 24 - Thu, Nov 27
BUF
Buffalo
SEA
Seattle
$281 Roundtrip, just found
$281
Roundtrip
just found
Select Delta flight, departing Mon, Nov 24 from Buffalo to Seattle, returning Thu, Nov 27, priced at $281 just found
American Airlines
Sat, Nov 1 - Wed, Nov 5
BUF
Buffalo
SEA
Seattle
$294 Roundtrip, found 4 hours ago
$294
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Sat, Nov 1 from Buffalo to Seattle, returning Wed, Nov 5, priced at $294 found 4 hours ago
American Airlines
Fri, Oct 31 - Tue, Nov 4
BUF
Buffalo
SEA
Seattle
$296 Roundtrip, found 1 day ago
$296
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 31 from Buffalo to Seattle, returning Tue, Nov 4, priced at $296 found 1 day ago
United
Tue, Feb 17 - Wed, Feb 18
BUF
Buffalo
SEA
Seattle
$310 Roundtrip, found 2 days ago
$310
Roundtrip
found 2 days ago
Select United flight, departing Tue, Feb 17 from Buffalo to Seattle, returning Wed, Feb 18, priced at $310 found 2 days ago
United
Tue, Feb 17 - Sat, Feb 21
BUF
Buffalo
SEA
Seattle
$311 Roundtrip, found 22 hours ago
$311
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Feb 17 from Buffalo to Seattle, returning Sat, Feb 21, priced at $311 found 22 hours ago
United
Tue, Feb 17 - Wed, Feb 18
BUF
Buffalo
SEA
Seattle
$312 Roundtrip, found 2 days ago
$312
Roundtrip
found 2 days ago
Select United flight, departing Tue, Feb 17 from Buffalo to Seattle, returning Wed, Feb 18, priced at $312 found 2 days ago
Southwest Airlines
Sun, Jan 18 - Thu, Jan 22
BUF
Buffalo
SEA
Seattle
$315 Roundtrip, found 6 days ago
$315
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Sun, Jan 18 from Buffalo to Seattle, returning Thu, Jan 22, priced at $315 found 6 days ago

Find the cheapest month to fly from Buffalo (BUF) to Seattle (SEA)

September is typically the cheapest month to fly

From $175 - $416 per traveler.

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $380
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $380

Frequently asked questions

How much does a flight from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA) cost?
Grab a cheap one-way flight from $140 or cheap return flight from $279 from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from BUF to SEA is February, when demand is low. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BUF to SEA flight.
How many flights per day from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA)?
You'll need to take a flight with a layover if you're traveling from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from BUF to SEA?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA) route, fly before 3 PM. Later flights have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your trip to book your flight from BUF to SEA generally means paying more. While you might find some last-minute deals, they aren't always guaranteed. Be flexible with your itinerary for a better chance of scoring a bargain.
Is it cheaper to book a BUF to SEA flight and hotel package?
You'll typically save money by booking a BUF to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After selecting your preferred accommodations and flights, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA)?
If you reserved your BUF to SEA flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$273
Distance
2116 mi

Book with confidence

Buffalo to Seattle Flights

The cheapest times to fly from Buffalo to Seattle

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 Buffalo to Seattle are during the month of February. You can find some of the cheapest flights from Buffalo to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Buffalo to Seattle

Sunday is one of the best days to book for cheap flights from Buffalo to Seattle: 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 Buffalo to Seattle

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 Buffalo to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $140 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 Buffalo to Seattle 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 Buffalo to Seattle 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.

 

Buffalo to Seattle Flights

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*Available to One Key members.