Cheap flights from Montana to Chicago from $152

The month of May is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Montana averaging around $341.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Thursday when prices can be found for as low as $434. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Montana because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $649.

Flying to Chicago O'Hare Intl Airport from Montana at noon is the least expensive time of day to depart. momondo users have found prices as low as $443 when looking at flights departing at noon. Try not to purchase tickets in the morning because they tend to be around $486. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Bozeman Gallatin Field to Chicago O'Hare Intl for the best Montana - Chicago O'Hare Intl flight prices

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Montana when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $382 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Montana for as low as $292 on momondo.

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

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from Montana to Chicago O'Hare Intl

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Montana according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 3 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

10 flights are operational daily from Montana to Chicago O'Hare Intl Airport as of September 2026. The most popular departure time for this route is 12:00PM, with 91% of flights per day taking off in the afternoon.

The number of flights available between Montana and Chicago O'Hare Intl Airport is 74 per week as of September 2026. The most frequent departure day is Mon, with 22% of weekly flights leaving on this day.