Cheap Flights from Buffalo (BUF) to St. Marys (KSM)

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Frequently asked questions

Is it cheaper to buy a plane ticket from Buffalo Niagara International Airport to St. Marys Airport last minute?
When it's time to book your flights, it pays to be prepared. While it may be possible to pick up a deal on a Buffalo Niagara International Airport to KSM flight at the last minute, tickets usually don't get cheaper as the date of departure nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days in advance. For international travel it's between three and four months.
What airports do you fly into for St. Mary's from Buffalo?
You can travel from Buffalo to St. Mary's via St. Marys Airport (KSM), Pilot Station Airport (PQS) or Mountain Village Airport (MOU). If you're wondering which hub to choose, take into account factors such as flight availability and the convenience of transferring from the airport to your hotel. Touch down at St. Marys Airport (KSM) and you'll be around 3 kilometers southwest of the middle of the city.
Can I change the date of my flight from Buffalo Niagara International Airport to St. Marys Airport?
Sometimes life gets in the way of plans, so Expedia is here to help make amending your journey easy. To start, find your Buffalo Niagara International Airport to St. Marys Airport itinerary through the Expedia Trips portal and read the fare rules and conditions about what changes you can make. If you booked your airfare in the last 24 hours, some carriers will let you cancel at no cost and organize new flights. If you booked your fare more than 24 hours ago, contact us via our Customer Service portal to run through your options.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
St. Marys
Distance
5595 km