Cheap flights from Illinois to Kalispell from $149

The month of October is, on average, the cheapest month to fly to Kalispell from Illinois, with most prices found around $191. If you aren’t able to travel to Kalispell during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $191.

The cheapest day to depart from Illinois to Kalispell is on a Tuesday. Travelers who choose to depart for Kalispell on a Tuesday will often find tickets for as low as $394. The most expensive day to fly to Kalispell is Thursday, with ticket prices averaging around $464.

According to our data, the cheapest time of day to fly to Kalispell is in the morning. momondo users have found flights departing from Illinois to Kalispell in the morning for as low as $410. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Kalispell, so prices are often more expensive at around $502 per ticket.

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

You are more likely to see cheaper flights to Kalispell from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Kalispell for around $452 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kalispell from Illinois for as low as $368 on momondo.

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

American Airlines, Sun Country Air, and United Airlines are the most popular carriers operating from Illinois to Kalispell Glacier Park

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Kalispell from Illinois according to our data. American Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Kalispell. Keep in mind that there are 4 different airlines that fly to Kalispell on a routine basis, so you have a few additional options to choose from.

The number of flights available between Illinois and Kalispell is 4 per day as of June 2026. The most frequent departure time is 9:00AM, with 61% of daily flights leaving at noon.

As of June 2026, there are 32 flights per week flying from Illinois to Kalispell. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.