$138 Cheap Flights from Seattle (SEA) to Buffalo (BUF)

View $138 flight on Mon, Sep 15, 2025Opens in a new window

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

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Cheap Flights from Seattle to Buffalo (SEA-BUF)

Prices were available within the past 7 days and start at $138 for one-way flights and $265 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Sep 20 - Fri, Oct 3
SEA
Seattle
BUF
Buffalo
$265 Roundtrip, found 1 day ago
$265
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 20 from Seattle to Buffalo, returning Fri, Oct 3, priced at $265 found 1 day ago
JetBlue Airways
Mon, Aug 11 - Tue, Aug 26
SEA
Seattle
BUF
Buffalo
$271 Roundtrip, found 3 hours ago
$271
Roundtrip
found 3 hours ago
Select JetBlue Airways flight, departing Mon, Aug 11 from Seattle to Buffalo, returning Tue, Aug 26, priced at $271 found 3 hours ago
Frontier Airlines
Mon, Sep 15 - Fri, Oct 3
SEA
Seattle
BUF
Buffalo
$273 Roundtrip, found 1 day ago
$273
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Sep 15 from Seattle to Buffalo, returning Fri, Oct 3, priced at $273 found 1 day ago
Frontier Airlines
Fri, Sep 19 - Mon, Sep 22
SEA
Seattle
BUF
Buffalo
$275 Roundtrip, found 9 hours ago
$275
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Fri, Sep 19 from Seattle to Buffalo, returning Mon, Sep 22, priced at $275 found 9 hours ago
Frontier Airlines
Fri, Oct 3 - Mon, Oct 20
SEA
Seattle
BUF
Buffalo
$281 Roundtrip, found 1 day ago
$281
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 3 from Seattle to Buffalo, returning Mon, Oct 20, priced at $281 found 1 day ago
Frontier Airlines
Fri, Sep 26 - Tue, Sep 30
SEA
Seattle
BUF
Buffalo
$285 Roundtrip, found 8 hours ago
$285
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Seattle to Buffalo, returning Tue, Sep 30, priced at $285 found 8 hours ago
JetBlue Airways
Tue, Aug 12 - Mon, Aug 25
SEA
Seattle
BUF
Buffalo
$286 Roundtrip, found 1 day ago
$286
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Aug 12 from Seattle to Buffalo, returning Mon, Aug 25, priced at $286 found 1 day ago
Sun Country Airlines
Sun, Aug 31 - Fri, Sep 5
SEA
Seattle
BUF
Buffalo
$294 Roundtrip, found 3 days ago
$294
Roundtrip
found 3 days ago
Select Sun Country Airlines flight, departing Sun, Aug 31 from Seattle to Buffalo, returning Fri, Sep 5, priced at $294 found 3 days ago
American Airlines
Wed, Aug 27 - Sun, Aug 31
SEA
Seattle
BUF
Buffalo
$308 Roundtrip, found 15 hours ago
$308
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Wed, Aug 27 from Seattle to Buffalo, returning Sun, Aug 31, priced at $308 found 15 hours ago
Southwest Airlines
Wed, Aug 13 - Mon, Aug 25
SEA
Seattle
BUF
Buffalo
$311 Roundtrip, found 3 hours ago
$311
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Wed, Aug 13 from Seattle to Buffalo, returning Mon, Aug 25, priced at $311 found 3 hours ago

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

August is typically the cheapest month to fly

From $235 - $487 per traveler.

Graph displaying average flight prices per month

Alternative airports near Buffalo

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

Select flight to Buffalo Niagara Intl. BUF. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $318
BUF
Buffalo Niagara Intl.
CheapestClosest
Average driving time to city center16 min
Flights from $318
Flights from Seattle (SEA) to Buffalo (BUF)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Buffalo Niagara Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$265
Distance
2116 mi

Seattle to Buffalo Flights

The cheapest times to fly from Seattle to Buffalo

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

 

The best time to book a flight from Seattle to Buffalo

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

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 Buffalo in 2025. You can also book with separate airlines for your outbound and return journeys, from $138 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 Buffalo 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 Buffalo 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.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF) cost?
Discover the latest flight deals from SEA to BUF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to BUF?
The cheapest flights from SEA to BUF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to BUF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to BUF. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF)?
There aren't any daily direct flights from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from SEA to BUF?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF)?
Select a flight from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this are on average 22% more likely to be 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 Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF) last-minute?
Last-minute fares from SEA to BUF are usually more expensive. To lock in the lowest prices, start searching for flights well in advance. That being said, if your travel plans are flexible, you may score a cheap ticket just before your departure.
Is it cheaper to book a SEA to BUF flight and hotel package?
You'll typically save money by securing a SEA to BUF flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After selecting your ideal flights and accommodations, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF)?
If you reserved your SEA to BUF flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare 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, head to our Customer Service portal for more information.

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*Available to One Key members.