$93 Cheap Flights from Buffalo (BUF) to St. Louis (STL)

View $93 flight on Sat, Nov 15, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $93 for one-way flights and $154 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, Dec 2 - Wed, Dec 3
BUF
Buffalo
STL
St. Louis
$154 Roundtrip, found 5 days ago
$154
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Dec 2 from Buffalo to St. Louis, returning Wed, Dec 3, priced at $154 found 5 days ago
Southwest Airlines
Wed, Nov 5 - Sat, Nov 8
BUF
Buffalo
STL
St. Louis
$164 Roundtrip, found 5 days ago
$164
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Wed, Nov 5 from Buffalo to St. Louis, returning Sat, Nov 8, priced at $164 found 5 days ago
American Airlines
Tue, Nov 4 - Wed, Nov 5
BUF
Buffalo
STL
St. Louis
$168 Roundtrip, found 5 days ago
$168
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Nov 4 from Buffalo to St. Louis, returning Wed, Nov 5, priced at $168 found 5 days ago
Frontier Airlines
Fri, Oct 3 - Sat, Oct 4
BUF
Buffalo
STL
St. Louis
$172 Roundtrip, found 9 hours ago
$172
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Fri, Oct 3 from Buffalo to St. Louis, returning Sat, Oct 4, priced at $172 found 9 hours ago
American Airlines
Wed, Nov 5 - Sat, Nov 8
BUF
Buffalo
STL
St. Louis
$179 Roundtrip, found 5 days ago
$179
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Nov 5 from Buffalo to St. Louis, returning Sat, Nov 8, priced at $179 found 5 days ago
American Airlines
Tue, Nov 4 - Wed, Nov 5
BUF
Buffalo
STL
St. Louis
$183 Roundtrip, found 5 days ago
$183
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Nov 4 from Buffalo to St. Louis, returning Wed, Nov 5, priced at $183 found 5 days ago
Frontier Airlines
Fri, Oct 17 - Thu, Oct 23
BUF
Buffalo
STL
St. Louis
$187 Roundtrip, found 20 hours ago
$187
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Fri, Oct 17 from Buffalo to St. Louis, returning Thu, Oct 23, priced at $187 found 20 hours ago
Southwest Airlines
Tue, Dec 2 - Wed, Dec 3
BUF
Buffalo
STL
St. Louis
$189 Roundtrip, found 5 days ago
$189
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Dec 2 from Buffalo to St. Louis, returning Wed, Dec 3, priced at $189 found 5 days ago
Delta
Thu, Oct 16 - Tue, Nov 4
BUF
Buffalo
STL
St. Louis
$189 Roundtrip, found 5 days ago
$189
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Oct 16 from Buffalo to St. Louis, returning Tue, Nov 4, priced at $189 found 5 days ago
United
Wed, Oct 8 - Tue, Oct 14
BUF
Buffalo
STL
St. Louis
$276 Roundtrip, found 19 hours ago
$276
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Oct 8 from Buffalo to St. Louis, returning Tue, Oct 14, priced at $276 found 19 hours ago

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

August is typically the cheapest month to fly

From $168 - $381 per traveler.

Frequently asked questions

How much does a flight from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $93 or cheap return flight from $154 from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL)?
December is the most affordable month to fly from BUF to STL. Traveling outside of peak seasons is often the key to better flight prices.
What is the cheapest airline that flies from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare different airlines, travel time 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 STL flight.
How many flights per day from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL)?
Direct flights from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BUF to STL?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change depending on the airline, time of year and other factors.*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 Lambert-St. Louis Intl. Airport (STL)?
To reach Lambert-St. Louis Intl. Airport (STL) on schedule, opt for a flight that leaves Buffalo Niagara Intl. Airport (BUF) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute fares from BUF to STL are usually more expensive. To lock in the lowest prices, start searching for flights well ahead of time. That being said, if you can play around with your travel dates, you may score a cheap fare right before your trip.
Is it cheaper to book a BUF to STL flight and hotel package?
You'll typically save money by booking a BUF to STL 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 choosing your ideal flights and accommodations, you can add extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Buffalo Niagara Intl. Airport (BUF) to Lambert-St. Louis Intl. Airport (STL)?
Generally, it's possible to reschedule or cancel your BUF to STL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$153
Distance
672 mi

Book with confidence

Book with confidence

Buffalo to St. Louis Flights

The cheapest times to fly from Buffalo to St. Louis

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

 

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

Sunday is one of the best days to book for cheap flights from Buffalo to St. Louis: 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 St. Louis

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 St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $93 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 St. Louis 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 St. Louis 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 St. Louis Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.