If you are not fortunate enough to live in the pacific northwest odds are you are flying to Mt Rainier! Below are the three closest airports to Mt Rainier National Park
Seattle-Tacoma International Airport
Portland International Airport
Vancouver International Airport
Seattle-Tacoma International Airport (SEA):
At about 51 miles away, Seattle-Tacoma International Airport is the closest airport to Mt Rainier National Park. A hub for Alaska and Delta Airlines, SeaTac also hosts 34 other airline companies, which gives many flight options and variety when planning your trip.
Distance From Mt Rainier: 51 miles (from Carbon River Ranger Station)
Estimated Driving Time: about 1hour and 10 minutes to Carbon River Ranger Station
Address: 17801 International Blvd, Seattle, WA 98158
This would be a last resort option if you are unable to get a flight from the other two airports, reason being this is the farthest from the park no matter how you slice it.
Distance From Mt Rainier: 195 miles (to Carbon River Ranger Station)
Estimated Driving Time: 4hours and 40minutes to Carbon River Ranger Station
Address: 3211 Grant McConachie Way, Richmond, BC V7B 0A4, Canada