$92 Cheap Flights from St. Louis (STL) to Buffalo (BUF)

View $92 flight on Thu, Oct 23, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF)

Cheap Flights from St. Louis to Buffalo (STL-BUF)

Prices were available within the past 7 days and start at $92 for one-way flights and $164 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
BUF
Buffalo
$164 Roundtrip, found 5 days ago
$164
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Oct 28 from St. Louis to Buffalo, returning Sat, Nov 1, priced at $164 found 5 days ago
Frontier Airlines
Sat, Sep 27 - Sun, Oct 5
STL
St. Louis
BUF
Buffalo
$172 Roundtrip, found 8 hours ago
$172
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Sat, Sep 27 from St. Louis to Buffalo, returning Sun, Oct 5, priced at $172 found 8 hours ago
American Airlines
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
BUF
Buffalo
$181 Roundtrip, found 5 days ago
$181
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Oct 28 from St. Louis to Buffalo, returning Sat, Nov 1, priced at $181 found 5 days ago
Frontier Airlines
Sat, Oct 4 - Sat, Oct 11
STL
St. Louis
BUF
Buffalo
$187 Roundtrip, found 2 hours ago
$187
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Oct 4 from St. Louis to Buffalo, returning Sat, Oct 11, priced at $187 found 2 hours ago
Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
BUF
Buffalo
$188 Roundtrip, found 5 days ago
$188
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Oct 28 from St. Louis to Buffalo, returning Sat, Nov 1, priced at $188 found 5 days ago
American Airlines
Wed, Oct 8 - Sat, Oct 18
STL
St. Louis
BUF
Buffalo
$195 Roundtrip, found 6 days ago
$195
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Oct 8 from St. Louis to Buffalo, returning Sat, Oct 18, priced at $195 found 6 days ago
Frontier Airlines
Sun, Oct 12 - Mon, Oct 20
STL
St. Louis
BUF
Buffalo
$197 Roundtrip, found 6 days ago
$197
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sun, Oct 12 from St. Louis to Buffalo, returning Mon, Oct 20, priced at $197 found 6 days ago
Delta
Tue, Oct 28 - Sat, Nov 1
STL
St. Louis
BUF
Buffalo
$198 Roundtrip, found 5 days ago
$198
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Oct 28 from St. Louis to Buffalo, returning Sat, Nov 1, priced at $198 found 5 days ago
Frontier Airlines
Thu, Oct 30 - Fri, Nov 7
STL
St. Louis
BUF
Buffalo
$202 Roundtrip, found 1 day ago
$202
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 30 from St. Louis to Buffalo, returning Fri, Nov 7, priced at $202 found 1 day ago
United
Wed, Oct 8 - Tue, Oct 14
STL
St. Louis
BUF
Buffalo
$257 Roundtrip, found 1 day ago
$257
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 8 from St. Louis to Buffalo, returning Tue, Oct 14, priced at $257 found 1 day ago

Find the cheapest month to fly from St. Louis (STL) to Buffalo (BUF)

August is typically the cheapest month to fly

From $158 - $482 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF) cost?
Lock in a cheap one-way flight from $92 or cheap return flight from $164 from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF) 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 Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF)?
The cheapest month to fly from STL to BUF is October, when there's less demand. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF)?
To find the cheapest airline flying from STL to BUF, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF)?
You'll have to book a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from STL to BUF?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF) route, fly before 3 PM. Flights after this time 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 Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF) last-minute?
Last-minute bookings from STL to BUF are typically more expensive. To lock in the best rates, start looking for flights well ahead of time. That being said, if your travel plans are flexible, you may land a cheap ticket just before your departure.
Is it cheaper to book a STL to BUF flight and hotel package?
You can save money by booking a STL 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 simple to manage it all in one convenient place. After selecting your ideal accommodations and flights, consider adding extras including activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Buffalo Niagara Intl. Airport (BUF)?
In most instances, you can cancel or reschedule your STL to BUF flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you need more details, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Buffalo Niagara Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$164
Distance
672 mi

Book with confidence

Book with confidence

St. Louis to Buffalo Flights

The cheapest times to fly from St. Louis 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 St. Louis to Buffalo are during the month of October. You can find some of the cheapest flights from St. Louis to Buffalo with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Buffalo

Sunday is one of the best days to book for cheap flights from St. Louis 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 St. Louis 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 St. Louis to Buffalo in 2025. You can also book with separate airlines for your outbound and return journeys, from $92 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 St. Louis 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 St. Louis 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.

 

St. Louis to Buffalo Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.