Rental cars are available at each airport.
The best way to tour the state is to fly to Montana and rent a car to move around the state. As we went to press, Amtrak served Montana on its Chicago-Seattle line. It crosses the northern portion of the state, skirting the southern border of Glacier National Park before crossing the Rocky Mountains. Greyhound provides bus service between Montana cities and to points outside the state. There have been calls to change the law, so check on its status at the time of your visit.