Terminal MAIN hosts Alaska Airlines across 2 gates.
The Main Terminal at Petersburg James A. Johnson Airport is a compact, single-building facility designed to handle a modest volume of regional traffic. It supports check-in, security screening, and boarding for Alaska Airlines flights, which primarily operate with Boeing 737 aircraft on short-haul routes within Alaska.[2][3][7] Facilities are basic but functional, reflecting the airport’s role as a critical transportation link rather than a large commercial hub.
Passengers can expect straightforward wayfinding, short walking distances, and quick transitions from curb to gate compared with larger airports. Amenities are limited, so travelers may wish to bring snacks, reading material, and any essential items, particularly during winter when weather can lengthen waiting times. Despite its small size, the terminal plays an essential role for Petersburg residents, supporting medical travel, business trips, and tourism throughout the year.