Cheap Flights from Buffalo Niagara to St Louis

Compare Buffalo Niagara to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

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Flight deals from Buffalo Niagara to St Louis

Looking for a cheap last-minute deal or the best return flight from Buffalo Niagara to St Louis? Find the lowest prices on one-way and return tickets right here.

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

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

Buffalo Niagara to St Louis: Alternative routes

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

Buffalo to St Louis: Flight information

The things to know before you go.
Cheapest flight found$397
Cheapest month to flyMarch

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

The best price we found for a return flight from Buffalo Niagara to St Louis is $397. 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 Buffalo Niagara to St Louis. But we found flights with one or more stops from $397.
As of December 2025, there are no flights flying from Buffalo Niagara to St Louis.
The cheapest month to fly from Buffalo Niagara to St Louis is usually March.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Buffalo Niagara Airport to St Louis Airport on Friday, 6 March 2026.
No airlines currently offer direct flights between Buffalo Niagara Airport and St Louis 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 St Louis 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 St Louis 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 St Louis.

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

  • The timezone in St Louis is UTC-5, which is one hour behind Buffalo.

  • To ensure you get on your BUF to STL flight, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and an hour before domestic flights is the standard rule.

  • You can expect longer queues in popular months like August. Arriving up to four hours in advance for an international flight and two hours for a domestic departure will give you ample time for security and boarding.

  • We make it a cinch to book a flight with a stopover. To see all your options for tickets from Buffalo Niagara International Airport to Lambert-St. Louis International Airport, uncheck 'Direct flights only.' Then, choose a flight with a stop long enough to visit the city of your choice. Worthwhile stopovers between BUF and STL include:

    • Detroit Metropolitan Wayne County Airport

    • Chicago Midway International Airport

    • O'Hare International Airport

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

  • The cheapest price we've found for a one-way Buffalo Niagara International Airport to Lambert-St. Louis International Airport flight is $149. A round-trip ticket is currently $397. Depending on the availability when you book, these fares could change.

  • It's a good idea to book in advance if you want to find cheap tickets from BUF to STL. That's because flight prices are based on demand, which tends to rise closer to departure.

  • The 'Whole month' search function shows you the cheapest flights from Buffalo Niagara International Airport to Lambert-St. Louis International Airport throughout the entire month. It's a great way to snap up a bargain if your plans aren't set in stone.

  • Landing cheap flights from BUF to STL couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll notify you as soon as fares go down.

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

Handy information about Buffalo Niagara International Airport (BUF)

  • BUF is located at Genesee Street.

  • When it comes to the on-time performance of Buffalo Niagara International Airport, data shows 75.46% of flights complete their journey on time.

  • To reach Buffalo Niagara International Airport from central Buffalo, it takes around 20 minutes if you're travelling by car. Of course, this depends on traffic. It's approximately 18 kilometres from the airport to the city centre.

  • The journey on public transport takes about 1 hour 15 minutes.

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

Arriving at Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • You'll find STL at 10701 Lambert International Blvd..

  • Lambert-St. Louis International Airport is approximately 26 kilometres from central St Louis. The drive time takes about 20 minutes.

  • It'll take around 35 minutes to get there using public transport.

When to fly to Lambert-St. Louis International Airport (STL)

  • It's time to work out your travel dates for your flight from Buffalo Niagara International Airport to Lambert-St. Louis International Airport. July is the most popular month to head to St Louis. If you'd like a more low-key vibe, go in April.

  • Book your flight from Buffalo Niagara International Airport to Lambert-St. Louis International Airport for July if you want to explore St Louis during its warmest month. You can expect temperatures of between 17ºC and 33ºC.

  • January has average temperatures of between -8ºC and 7ºC. Search for cheap tickets from BUF to STL around that time if you want to travel in cooler conditions.

Explore more of United States

  • You've seen St Louis, now it's time to explore more of United States. Travel around 418 kilometres north-east to Chicago to check off its top attractions. From Millennium Park to Art Institute of Chicago and LandShark Beer Garden at Navy Pier, you've got a jam-packed schedule ahead.

  • If there's time to check out another side of United States, head for Indianapolis, about 370 kilometres east of St Louis. The Children's Museum of Indianapolis, Indianapolis Museum of Art and Indianapolis Zoo are highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.