Cheap flights from Illinois to Missoula from $128

The month of June is, on average, the cheapest month to fly to Missoula from Illinois, with most prices found around $134. If you are unable to visit Missoula during the month of June, then departing from Illinois during the month July is also very affordable. Most momondo users find prices during this month for around $177.

On average, the least expensive day to fly to Missoula from Illinois is on a Monday. momondo users have found tickets for Monday departures for as low as $371. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $446.

The cheapest time of day to fly to Missoula is in the evening when flights can be purchased for as low as $329. Flights in the morning are often more expensive with an average ticket price of $425.

Fly from Chicago O'Hare Intl to Missoula Johnson-Bell Field for the best Illinois - Missoula Johnson-Bell Field flight prices

You are more likely to see cheaper flights to Missoula from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Missoula for around $434 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missoula from Illinois for as low as $283 on momondo.

As of May 2026, 2 flights take off from Illinois and land in Missoula each day. The most common flight departure time for this route is 9:00AM, with 100% of daily flights taking off at noon.

The number of flights available between Illinois and Missoula is 14 per week as of May 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.