Bellingham International Airport is three miles (5 km) northwest of Bellingham, in Whatcom County, Washington, United States. BLI covers 2,190 acres (886 ha) of land, and is the third-largest commercial airport in Washington.

Bellingham is the county seat of Whatcom County in the U.S. state of Washington. It lies 21 miles (34 km) south of the U.S.–Canada border, between Vancouver, British Columbia, 52 miles (84 km) to the northwest and Seattle (90 miles to the south.