There are
1,580 mi
from Billings, MT to Pasadena, TX
That's the driving distance. It would take 1 day 3 hours to go from Billings, Montana to Pasadena, Texas.
The flight distance (direct flight from Billings, MT to Pasadena, TX) is 1,324.04 mi.
1,580 mi = 1.61 kms