C$129 Cheap Flights from St Louis (STL) to Buffalo Niagara (BUF)

Compare St Louis to Buffalo Niagara flight deals

Find the cheapest month or even day of the year to fly to Buffalo Niagara

Book the best Buffalo Niagara fare with no extra fees

Flight deals from St Louis to Buffalo Niagara

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Buffalo Niagara Airport? If you want to travel next month, return fares start from C$262. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Buffalo Niagara

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Buffalo Niagara flights are currently cheapest in August.

St Louis to Buffalo Niagara: Alternative routes

Compare routes from St Louis to Buffalo below. You may find an airport to fly into that's cheaper, faster, or easier than Buffalo Niagara.

St Louis to Buffalo: Flight information

The things to know before you go.
Cheapest flight foundC$129
Cheapest month to flyAugust

Finding cheap flights from St Louis to Buffalo Niagara: Frequently asked questions

The best price we found for a return flight from St Louis to Buffalo Niagara is C$251. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Buffalo Niagara. But we found flights with one or more stops from C$251.
As of June 2026, there are no flights flying from St Louis to Buffalo Niagara.
The cheapest month to fly from St Louis to Buffalo Niagara is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Buffalo Niagara Airport on Tuesday, August 4, 2026.
No airlines currently offer direct flights between St Louis Airport and Buffalo Niagara Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Buffalo Niagara but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Buffalo is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Frontier Airlines offers the cheapest flight tickets to Buffalo Niagara.

Flying from Lambert-St. Louis International Airport (STL) to Buffalo Niagara International Airport (BUF): what you need to know

  • Taking off during a peak time like public or school holidays? Expect longer lines at security and check-in. To be on the safe side, arrive up to four hours before international flights and two hours ahead of domestic departures.

  • If you'd like a stopover for your flight from Lambert-St. Louis International Airport to Buffalo Niagara International Airport, simply uncheck 'Direct flights only' and check out your options. These are the top stopovers between STL and BUF:

    • Nashville International Airport

    • Detroit Metropolitan Wayne County Airport

    • Chicago Midway International Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Buffalo Niagara International Airport (BUF)

  • The lowest price we've found for a one-way ticket from Lambert-St. Louis International Airport to Buffalo Niagara International Airport is C$129. For a return flight on this route, the best price is C$251. Depending on the availability when you book, these fares could change.

  • To get your hands on cheap flight tickets from STL to BUF, book early. Airlines typically offer their most competitively priced fares when flights are first made available.

  • The 'Whole month' tool shows you the cheapest flight tickets from Lambert-St. Louis International Airport to Buffalo Niagara International Airport throughout the month. It's the best way to snap up a bargain if your travel dates are flexible.

  • Getting a cheap ticket from STL to BUF is a piece of cake with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch as soon as the price has dropped.

  • Take advantage of filters to find the ideal journey for you. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Lambert-St. Louis International Airport to Buffalo Niagara International Airport, use the 'Sort by' tool. You can also filter by airline, arrival and departure times, and journey duration.

Handy information about Lambert-St. Louis International Airport (STL)

  • Located around 26 kilometres from central St Louis, Lambert-St. Louis International Airport can be reached in approximately 21 minutes by car, depending on traffic. The ride on public transport is roughly 36 minutes.

  • Have an early flight from Lambert-St. Louis International Airport to Buffalo Niagara International Airport? Avoid rushing to the airport (and catch some extra z's) by picking one of these stays near STL:

Arriving at Buffalo Niagara International Airport (BUF)

Getting from Buffalo Niagara International Airport (BUF) to central Buffalo

  • From Buffalo Niagara International Airport, Buffalo is approximately 18 kilometres away. It takes around 21 minutes to get to the center driving.

  • It typically takes 1 hour and 15 minutes if you're using public transport.

When to fly to Buffalo Niagara International Airport (BUF)

  • The quietest month for a flight from Lambert-St. Louis International Airport to Buffalo Niagara International Airport is May, while August is the most popular. Pick the ideal time to visit Buffalo based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • Book your flight from Lambert-St. Louis International Airport to Buffalo Niagara International Airport for July if you'd like to explore Buffalo during its warmest month. Expect temperatures of between 15ºC and 28ºC.

  • If you like traveling in cooler conditions, search for a cheap ticket from STL to BUF in January. Temperatures average between -10ºC and 2ºC then.

More about Buffalo

Complete your Buffalo trip with hotels and a car rental

  • Comparing flights is not the only thing we do. After booking your cheap ticket to Buffalo Niagara International Airport, check out our great car rental offers that'll give you the freedom to see the sights at your own pace. Next, take a look at our exclusive rates for hotels to find the perfect Buffalo stay.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.