Cheap Flights from St Louis to Buffalo Niagara

Compare St Louis to Buffalo Niagara flight deals

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

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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 $426. 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 July.

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 found$426
Cheapest month to flyJuly

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 $426. 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 $426.
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 July.
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 Friday, 17 July 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.

Travelling from St Louis Airport (STL) to Buffalo Niagara Airport (BUF): what you need to know

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to board your STL to BUF flight.

  • Travelling during a peak month like July? Public holidays and other popular periods can result in longer lines and delays at check-in and security. Play it safe and get there up to four hours ahead of an international flight and two hours before domestic departures.

  • Consider adding a stopover when booking your ticket from St Louis Airport to Buffalo Niagara Airport. Simply uncheck 'Direct flights only' to break up your journey, or enjoy a detour to a new and interesting place. Here's where you can stop between STL and BUF:

    • Detroit Wayne County Airport

    • Nashville Airport

    • Baltimore Washington International Airport

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

  • The cheapest price we've seen for a one-way St Louis Airport to Buffalo Niagara Airport flight is $219. A round-trip ticket is currently $426. Depending on the availability and when you book, these fares can change.

  • It's usually best to book early if you're looking for cheap tickets from STL to BUF. That's because flight prices are based on demand, which tends to rise closer to the date of departure.

  • Finding cheap flights from St Louis Airport to Buffalo Niagara Airport is more likely if you're flexible with your trip dates. Use the 'Whole month' search function to see the lowest fares across every month and bag a great deal.

  • Stay on top of deals for cheap flights from STL to BUF by creating a Price Alert. You'll receive an email or push notification on the app when fares go down.

  • Tailor your flights with filters. Pick your ideal departure and arrival times, total journey duration and airlines. You can also sort the results by 'Fastest,' 'Best' or 'Cheapest' flights from St Louis Airport to Buffalo Niagara Airport.

Handy information about St Louis Airport (STL)

Arriving at Buffalo Niagara Airport (BUF)

  • The last thing you want is a long journey to your hotel if you're getting in late on a St Louis Airport to Buffalo Niagara Airport flight. Check in to one of these accommodation options near BUF instead:

  • Begin your adventure by picking up a Buffalo Niagara Airport rental car. Grab a set of wheels from Dollar, Hertz or Budget and explore beyond Buffalo's usual tourist stops.

  • Booking your ride from Buffalo Niagara Airport about two weeks in advance can help you secure the lowest rate.

When to fly to Buffalo Niagara Airport (BUF)

  • The quietest month for a flight from St Louis Airport to Buffalo Niagara Airport is March, while August is the most popular. Choose the best time to visit Buffalo based on whether you prefer a more relaxed vibe or a faster pace.

  • The warmest month in Buffalo is July, with temperatures ranging between 15ºC and 29ºC. Book your flights from St Louis Airport to Buffalo Niagara Airport in this month if this is the type of weather you enjoy.

  • January sees average temperatures of between -10ºC and 2ºC. Look for cheap tickets from STL to BUF around that time if you want to travel when it's cooler.

Explore more of the United States

  • You've seen Buffalo, now it's time to explore other parts of the United States. Journey around 467 kilometres south-east to New York to check off its top sights. From Central Park to Statue of Liberty and Metropolitan Museum of Art, there's plenty to keep you on the go.

  • Philadelphia is another favourite destination in the United States and is around 451 kilometres south-east of Buffalo. No trip is complete without experiencing Independence Hall, Liberty Bell and Philadelphia Museum of Art.

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