The cheapest times to fly from STL to BUF are

  • April 2nd to May 6th (except the week of April 16th)
  • May 28th to July 15th (except the week of June 25th)
  • October 8th to November 18th
  • December 3rd to March 4th (except the weeks of December 17th and February 19th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STL to BUF is early to mid July. Prices can be as high as $833 for Monday flights during early to mid May, or as low as $257 for Tuesday flights around early to mid July.


When to Fly to Buffalo

Flying from St. Louis, MO (STL) to Buffalo, NY (BUF) will usually cost between $258 to $440 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid July with an average ticket price of $300. Due to high demand the most expensive time to fly is early to mid May, with an average price of $416. Planning your trip to low-cost times can easily save you $116 on economy flights and even more on first-class flights. Generally, any price below $347 can be considered a good price for a round-trip STL to BUF flight.

See below for a graph of average weekly prices for the STL to BUF route. All prices are for round-trip tickets in USD.

STL to BUF Flight Prices

Compared to other flights, the STL to BUF flight is much cheaper than the average and costs much less than the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.32, which is in the normal range for a flight.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Mondays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $99 (26%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $286. Return trip prices are from the BUF to STL flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from STL to BUF can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 2 hour 12 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from STL to BUF while comparing.

Destination alternative #1: Erie International/Tom Ridge Field Airport (ERI) in Erie, PA

  • 94 miles (151 km) away from BUF
  • Usually 16.88% less expensive than BUF
  • 1-layover flights available

See STL to ERI flights

Destination alternative #2: Greater Rochester International Airport (ROC) in Rochester, NY

  • 55 miles (89 km) away from BUF
  • Usually 8.51% less expensive than BUF
  • 1-layover flights available

See STL to ROC flights

Destination alternative #3: Syracuse Hancock International Airport (SYR) in Syracuse, NY

  • 133 miles (214 km) away from BUF
  • Usually 4.76% less expensive than BUF
  • 1-layover flights available

See STL to SYR flights


Flight Questions Answered

Still have questions about flying from STL to BUF? We’ve got answers.

Which airlines fly this route?

You can find 6 major airlines flying this route most often: American, Cape Air, Delta, Frontier, Southwest, United, and potentially more during busy seasons.

How far away is it from Buffalo Niagara International Airport to St Louis Lambert International Airport?

The distance between the two airports is roughly 673 miles or 1083 kilometers.

How long does it take to fly from STL to BUF?

The real-world flight time for a nonstop STL to BUF flight is about 2 hour 12 minutes.

How many flights go between St. Louis, MO and Buffalo, NY?

It depends on the day of the week and the date, but a typical day might have around 71 available flights from STL to BUF.


Airport Location Info


Departing Airport

Origination code STL
Origination airport name St Louis Lambert International Airport
City St. Louis, MO
Country the United States
Latitude 38.7
Longitude -90.4

Return Airport

Destination code BUF
Destination airport name Buffalo Niagara International Airport
City Buffalo, NY
Country the United States
Latitude 42.9
Longitude -78.7


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.