Jackson Hole Airport (JAC) sits inside Grand Teton National Park, 15 minutes from Jackson's Town Square — the most convenient gateway to the Wyoming side. Idaho Falls (IDA) is the closest airport to the Idaho/Teton Valley side, about 1.5 hours away, and the nearest large hub is Salt Lake City (SLC, ~4.5 hours). Teton Pass (WY-22/ID-33) links the two sides but can close or require chains in winter.