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CA $157 Cheap Flights from St. Louis (STL) to Buffalo (BUF)

View CA $157 flight on Sat, Aug 8, 2026Opens in a new window

Flight 1

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

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Cheap flights from St. Louis (STL) to Buffalo (BUF)

Prices were available within the past 7 days and start at CA $157 for one-way flights and CA $429 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug 18 - Wed, Aug 26
STL
St. Louis
BUF
Buffalo
CA $429 Roundtrip, found 2 days ago
CA $429
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Aug 18 from St. Louis to Buffalo, returning Wed, Aug 26, priced at CA $429 found 2 days ago
Delta
Tue, Aug 18 - Sun, Aug 23
STL
St. Louis
BUF
Buffalo
CA $488 Roundtrip, found 2 days ago
CA $488
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Aug 18 from St. Louis to Buffalo, returning Sun, Aug 23, priced at CA $488 found 2 days ago
American Airlines
Tue, Aug 18 - Sun, Aug 23
STL
St. Louis
BUF
Buffalo
CA $517 Roundtrip, found 2 days ago
CA $517
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Aug 18 from St. Louis to Buffalo, returning Sun, Aug 23, priced at CA $517 found 2 days ago
Delta
Tue, Aug 18 - Fri, Aug 21
STL
St. Louis
BUF
Buffalo
CA $530 Roundtrip, found 2 days ago
CA $530
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Aug 18 from St. Louis to Buffalo, returning Fri, Aug 21, priced at CA $530 found 2 days ago
Delta
Thu, Aug 20 - Wed, Aug 26
STL
St. Louis
BUF
Buffalo
CA $536 Roundtrip, found 2 days ago
CA $536
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Aug 20 from St. Louis to Buffalo, returning Wed, Aug 26, priced at CA $536 found 2 days ago
United
Sat, Aug 15 - Thu, Aug 20
STL
St. Louis
BUF
Buffalo
CA $543 Roundtrip, found 2 days ago
CA $543
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 15 from St. Louis to Buffalo, returning Thu, Aug 20, priced at CA $543 found 2 days ago
United
Tue, Aug 18 - Sun, Aug 23
STL
St. Louis
BUF
Buffalo
CA $545 Roundtrip, found 2 days ago
CA $545
Roundtrip
found 2 days ago
Select United flight, departing Tue, Aug 18 from St. Louis to Buffalo, returning Sun, Aug 23, priced at CA $545 found 2 days ago
Delta
Fri, Aug 21 - Sun, Aug 23
STL
St. Louis
BUF
Buffalo
CA $548 Roundtrip, found 2 days ago
CA $548
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Aug 21 from St. Louis to Buffalo, returning Sun, Aug 23, priced at CA $548 found 2 days ago
Delta
Tue, Aug 18 - Sun, Aug 23
STL
St. Louis
BUF
Buffalo
CA $551 Roundtrip, found 2 days ago
CA $551
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Aug 18 from St. Louis to Buffalo, returning Sun, Aug 23, priced at CA $551 found 2 days ago
American Airlines
Fri, Aug 21 - Mon, Aug 24
STL
St. Louis
BUF
Buffalo
CA $561 Roundtrip, found 2 days ago
CA $561
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Aug 21 from St. Louis to Buffalo, returning Mon, Aug 24, priced at CA $561 found 2 days ago

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

January is typically the cheapest month to fly

From CA $270 - CA $981 per traveller.

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) cost?
You can find cheap one-way flights from CA $157 and cheap return flights from CA $429 STL to BUF with Expedia. One-way flights typically cost between CA$230 and CA$768, and return flights often range between CA$797 and CA$1556. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when STL to BUF ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The cheapest months to fly from STL to BUF are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
Enter STL to BUF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
Southwest Airlines is one of the cheapest airlines offering connecting return flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.), with prices starting from around CA$238 for flights that can be booked for departure within the next year, with a layover in Sarasota-Bradenton Intl. (SRQ). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from St. Louis, MO (STL) to Buffalo, NY (BUF)?
To find a cheap flight from St. Louis, MO (STL) to Buffalo, NY (BUF), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
There are approximately 80 connecting flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.). Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Midway Intl. (MDW).
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) typically departs around 5:00 AM local time. This flight is operated by American Airlines. This is a seasonal service, active in January, November, and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) on a Friday, with around 53 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United. Friday offers notably more flight options compared to other days of the week, making it a good day to consider if you need flexibility.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
The most popular departure times for flights from Lambert-St. Louis Intl. (STL) to Buffalo Niagara Intl. (BUF) are in the early morning, from 6am to 9am. Many major carriers, including American Airlines, Delta and Southwest Airlines, offer flights during this window. Many travellers prefer this time as it allows for an early start to their journey, giving them more time at their destination.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
There are no nonstop flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.). For flights with one stop, you can expect the journey to take around 5 hours, covering a distance of approximately 1,083 kilometres. Flights with two or more stops typically take longer, averaging about 8 hours 48 minutes. Keep in mind that actual travel times can vary depending on your specific routing, layover durations, and factors like wind patterns.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.)?
Yes, you can fly business class or first class between STL and BUF. Airlines that offer business class service on this route include:
  • Frontier Airlines
  • Delta
First class cabins are available on:
  • United
  • Delta
  • American Airlines
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Buffalo, NY (BUF) from St. Louis, MO (STL)?
If you're planning to travel to Buffalo from Lambert-St. Louis Intl. (STL), you can fly directly into Buffalo Niagara Intl. (BUF). Some flights may connect through major hubs like O'Hare Intl. (ORD), Charlotte-Douglas Intl. (CLT), or Nashville Intl. (BNA) before reaching Buffalo. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Buffalo, NY (BUF-Buffalo Niagara Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL) to Buffalo, NY (BUF)?
If you booked your St. Louis, MO (STL) to Buffalo, NY (BUF) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Buffalo Niagara Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
CA $428
Distance
1076 km

Book with confidence

St. Louis to Buffalo Flights

The easy way to book your flights from St. Louis to Buffalo 

With Expedia, it’s simple to find and book flights to Buffalo from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Buffalo Niagara Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Buffalo today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Buffalo Niagara Intl., BUF 

Sort your search results by price to find great deals on your flight from St. Louis to Buffalo—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Buffalo from St. Louis currently is just CA $429 rising to CA $561.  

Here are more money-saving tips: 

  • Fly in August when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Buffalo  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Buffalo from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Buffalo with Expedia today.

St. Louis to Buffalo Flights

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*Available to Expedia members.