St Mary's Airport (KSM)

St. Mary's Airport (KSM), also identified as PASM, serves as a critical regional hub in the Kusilvak Census Area of Alaska, located approximately 4 miles west of the city of St. Mary's. The facility acts as a vital lifeline for the Yukon-Kuskokwim region, facilitating the movement of essential cargo, mail, and medical supplies, alongside regional passenger transit. The airport features a primary 6,008-foot gravel runway (17/35) and a shorter crosswind runway, both of which have recently undergone a major $53.5 million reconstruction and resurfacing project completed in 2025 to meet modern FAA safety standards. The passenger terminal at St. Mary's is a compact, single-story building designed for functionality and efficient regional transfers. Inside, travelers will find a basic waiting hall and essential check-in services provided by regional carriers such as Grant Aviation and Ryan Air Service. Due to its rural location, the terminal does not house formal restaurants, cafes, or extensive retail shops; instead, amenities are limited to vending machines for light snacks. Passengers are encouraged to plan accordingly and bring their own refreshments, as facilities are geared toward quick transitions rather than long-term stays. Infrastructure improvements at KSM have significantly enhanced the airport's capacity to handle larger regional aircraft like the Dash 8-100 through expanded Runway Safety Areas (RSA) and modernized airfield lighting systems. The 2023–2025 development phase also included the paving of the main commercial apron and significant drainage upgrades to address subsurface water issues, ensuring the airfield remains operational during Alaska's challenging seasonal transitions. Ground transportation from the airport is primarily conducted through local private vehicles and pre-arranged community transport, as there are no conventional taxi or bus services stationed at the terminal.