It is 1,238 miles according to Google Maps.
California
It depends on what city you are from. Los Angeles is about 1500 miles away, from western Montana.
Yes, California is 158,302 square miles and Montana is 147,046 square miles.
About 557 air miles.
157 miles
48 Miles.
202 Miles.
285 miles
Montana, USA - 147,165 square miles.
The Crow Indian Reservation is the largest reservation in Montana in square miles with a total of 3,606.54 square miles.
The air distance from Billings, Montana, to San Francisco, California, is 906 miles. That equals 1,457 kilometers or 787 nautical miles.