hi there,
There is more than one major airport in Montana and if you are looking to flying into Montana, you can fly to Billings, Bozeman, Butte, or a handful of other places, without having to use ground transportation.
If cheap Montana flights are what you're after, comparing the prices for flights that arrive at different airports can be a good way to find the best rates.
I would say that most people who fly to Montana arrive first at the
Billings Logan International
Airport, although some of the smaller Montana airports handle direct flights from some U.S. cities.