CA $202 Cheap Flights from Buffalo (BUF) to St. Louis (STL)

View CA $202 flight on Tue, Aug 4, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at CA $202 for one-way flights and CA $403 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Jun 9 - Wed, Jun 10
BUF
Buffalo
STL
St. Louis
CA $403 Roundtrip, found 6 days ago
CA $403
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jun 9 from Buffalo to St. Louis, returning Wed, Jun 10, priced at CA $403 found 6 days ago
American Airlines
Wed, Jul 29 - Wed, Aug 12
BUF
Buffalo
STL
St. Louis
CA $404 Roundtrip, found 2 days ago
CA $404
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jul 29 from Buffalo to St. Louis, returning Wed, Aug 12, priced at CA $404 found 2 days ago
Delta
Wed, Jun 10 - Tue, Jun 16
BUF
Buffalo
STL
St. Louis
CA $406 Roundtrip, found 2 hours ago
CA $406
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Jun 10 from Buffalo to St. Louis, returning Tue, Jun 16, priced at CA $406 found 2 hours ago
Delta
Wed, Jul 29 - Wed, Aug 12
BUF
Buffalo
STL
St. Louis
CA $407 Roundtrip, found 2 days ago
CA $407
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Jul 29 from Buffalo to St. Louis, returning Wed, Aug 12, priced at CA $407 found 2 days ago
American Airlines
Tue, Jun 9 - Wed, Jun 10
BUF
Buffalo
STL
St. Louis
CA $411 Roundtrip, found 6 days ago
CA $411
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jun 9 from Buffalo to St. Louis, returning Wed, Jun 10, priced at CA $411 found 6 days ago
Delta
Wed, Jul 1 - Wed, Jul 8
BUF
Buffalo
STL
St. Louis
CA $417 Roundtrip, found 4 days ago
CA $417
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Jul 1 from Buffalo to St. Louis, returning Wed, Jul 8, priced at CA $417 found 4 days ago
American Airlines
Thu, Jul 30 - Tue, Aug 4
BUF
Buffalo
STL
St. Louis
CA $420 Roundtrip, found 1 day ago
CA $420
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Jul 30 from Buffalo to St. Louis, returning Tue, Aug 4, priced at CA $420 found 1 day ago
Delta
Wed, Jun 10 - Sat, Jun 13
BUF
Buffalo
STL
St. Louis
CA $422 Roundtrip, found 2 hours ago
CA $422
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Jun 10 from Buffalo to St. Louis, returning Sat, Jun 13, priced at CA $422 found 2 hours ago
Delta
Tue, Aug 4 - Sat, Aug 8
BUF
Buffalo
STL
St. Louis
CA $423 Roundtrip, found 1 day ago
CA $423
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Aug 4 from Buffalo to St. Louis, returning Sat, Aug 8, priced at CA $423 found 1 day ago
United
Sat, Jun 13 - Sun, Jun 14
BUF
Buffalo
STL
St. Louis
CA $624 Roundtrip, found 2 hours ago
CA $624
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Jun 13 from Buffalo to St. Louis, returning Sun, Jun 14, priced at CA $624 found 2 hours ago

Alternative airports near St. Louis

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

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city centre is 20 minutes. Flights from CA $433
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city centre20 min
Flights from CA $433

Frequently asked questions

How much does a flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) cost?
One-way flights typically cost between $557 and $1,844 and return flights often range between $822 and $2,575. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
September is typically the cheapest month to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), with average round-trip fares of approximately 752 CAD. This is about 23% lower than the average price throughout the year. September often sees lower prices as the summer travel season winds down and before the holiday rush begins, leading to reduced demand. Other cheap months to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) include May and August.*Averages based on flights available on Expedia in the last year.
How do I find cheap flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
To find a cheap flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.), 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The best time to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) is typically August or September. These months offer a great balance, as they are both the cheapest and most popular times to travel. You can expect round-trip flights to be around 752 CAD, and with high demand, you'll find plenty of flight options to choose from. This information is based on booking data from the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
There are approximately 55 connecting flights per day from Buffalo Niagara Intl. (BUF) to Lambert-St. Louis Intl. (STL). Some common connection points include O'Hare Intl. (ORD), Baltimore Washington Intl. Thurgood Marshall (BWI), and Midway Intl. (MDW).
What is the earliest flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The earliest flight from Buffalo Niagara Intl. (BUF) to Lambert-St. Louis Intl. (STL) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in December. An early departure like this can help you maximize 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
You'll typically find the most flights from Buffalo Niagara Intl. (BUF) to Lambert-St. Louis Intl. (STL) on a Friday, with around 42 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United Airlines. Flight schedules are consistent throughout the week, with Friday offering only slightly more flights than other days.
What are the most popular departure times for flights from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
The most popular departure times for flights from Buffalo Niagara Intl. (BUF) to Lambert-St. Louis Intl. (STL) are in the early morning, between 6am and 9am. About 29% of passengers prefer this time window. Many major carriers, including Southwest Airlines, Delta Air Lines and American Airlines, offer flights during this window. This timing works well for travelers who want to arrive at their destination early in the day, giving them more time for business or leisure activities.
How long does it take to fly from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Flights from BUF to STL with one stop typically take around 5 hours 20 minutes, covering approximately 673 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
Select the "Business class" and "First class" filters when looking for BUF to STL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight with Expedia?
It's easy to earn miles on a Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 St. Louis from Buffalo Niagara Intl. (BUF)?
From Buffalo Niagara Intl. (BUF), you can fly into Lambert-St. Louis Intl. (STL) to reach St. Louis. Some flights may connect through major hubs like Baltimore Washington Intl. Thurgood Marshall (BWI), Midway Intl. (MDW), Washington Dulles Intl. (IAD) before reaching St. Louis. 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) at the last minute?
Typically, booking a last minute flight from Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) flight and hotel package?
Securing a Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.)?
If you booked your Buffalo, NY (BUF-Buffalo Niagara Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) 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
Buffalo Niagara Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
CA $403
Distance
1076 km
Average flight time
3 hours 30 mins

Book with confidence

Buffalo to St. Louis Flights

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

With Expedia, it’s simple to find and book flights to St. Louis from Buffalo 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 Lambert-St. Louis 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 Buffalo to St. Louis today, tomorrow, or this week.  

 

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

Sort your search results by price to find great deals on your flight from Buffalo to St. Louis—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to St. Louis from Buffalo currently is just CA $403 rising to CA $624.  

Here are more money-saving tips: 

  • Fly in June when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to St. Louis  
  • 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 St. Louis from Buffalo 

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 St. Louis with Expedia today.

Buffalo to St. Louis Flights

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