Cheap flights from Chicago to Montana from $137

The cheapest month to fly to Montana from Chicago is in April. Flight prices, which tend to average around $350, are often lower during this time because this is during the off-season. The month of May is another great option to travel to Montana, with average flight prices from Chicago averaging around $360.

Our data shows that Tuesday is the least expensive day to fly to Montana. Tickets to fly out on this day can be as low as $365. The most expensive day to fly to Montana is Sunday, with ticket prices averaging around $410.

The cheapest time of day to fly to Montana is at noon when flights can be purchased for as low as $362. In the afternoon is when there is more demand to fly to Montana, so prices are often more expensive at around $412 per ticket.

Fly from Chicago O'Hare Intl to Kalispell Glacier Park for the best Chicago - Montana flight prices

You are more likely to see cheaper flights to Montana from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Montana for around $383 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Montana from Chicago for as low as $317 on momondo.

There are 4 cabin classes available to choose from on Chicago to Montana flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, Delta, and Southwest are the most popular carriers operating from Chicago to Montana

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Montana from Chicago according to our data. American Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Montana. Keep in mind that there are 5 different airlines that fly to Montana on a routine basis, so you have a few additional options to choose from.

As of October 2026, there are 2 flights per day flying from Chicago to Montana. The most common time of day flights depart is 9:00AM, with 85% of flights taking off at noon.

16 flights are operational weekly from Chicago to Montana as of October 2026. The most popular departure day for this route is Thu, with 31% of flights per week taking off on this day.