Cheap Flights from Boston (BOS) to St. Marys (KSM)

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Frequently asked questions

Is it cheaper to buy a plane ticket from BOS to St. Marys Airport last minute?
When it's time to book your flights, it's always better to be prepared. While you may be able to score a last-minute deal on a BOS to St. Marys Airport (KSM) flight, prices usually don't get cheaper as the departure date 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 three to four months.
What airports do you fly into for St. Mary's from Boston?
There are three airports you can fly to on your trip from Boston to St. Mary's: St. Marys Airport (KSM), Pilot Station Airport (PQS) and Mountain Village Airport (MOU). St. Marys Airport (KSM) is approximately 3 kilometers southwest of the center of St. Mary's. Before picking which terminal to land at, think about flight prices and availability, the distance to your next stop and the cost and ease of getting from the airport.
Can I change the date of my flight from Logan Intl. Airport to KSM?
It's so easy to make changes to your BOS to KSM journey yourself. Just log in to the Expedia Trips portal and click on "change flight." Search for new flights and secure the one that fits your plans. You'll get an estimate of your flight change fee, if applicable. You can also find your way to our Customer Service portal to connect with our Virtual Agent and get answers to all your questions.

Travel information

Origin airport
Logan Intl.
Destination airport
St. Marys
Distance
6016 km

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