Cheap flights from Montana to Illinois from $93
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montana to Illinois departing on 9/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Montana to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Montana is in January. Flight prices, which tend to average around $347, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $348.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Montana to Illinois is on a Wednesday when prices can be found for as low as $486. Flights from Montana to Illinois on a Sunday will generally be more expensive and average around $718. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Montana to Illinois during this time can be as low as $444. Flights in the morning are often more expensive with an average ticket price of $583.
What is the cheapest Montana to Illinois flight route?
Fly from Bozeman Gallatin Field to Chicago O'Hare Intl for the best Montana - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Montana when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $419 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Montana for as low as $247 on momondo.
What cabin class options are available on Montana to Illinois flights?
There are 4 cabin classes available to choose from on Montana to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Montana to Illinois?
Hawaiian Airlines, Alaska Airlines, and Southwest are the most popular carriers operating from Montana to Illinois
What airlines fly to Illinois?
United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Montana according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Montana to Illinois on average per day?
As of June 2025, 27 flights take off from Montana and land in Illinois each day. The most common flight departure time for this route is 12:00PM, with 79% of daily flights taking off in the afternoon.
How many flights depart from Montana to Illinois on average per week?
As of June 2025, 190 flights take off from Montana and land in Illinois each week. The most common flight departure day for this route is Mon, with 16% of weekly flights taking off on this day.
Cheap Montana to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Montana to Illinois
When did momondo last update prices for flights from Montana to Illinois?
Prices for flights from Montana to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Montana to Illinois?
The number of operators available for flights from Montana to Illinois is 5 as of June 2025.
How old do you have to be to fly from Montana to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montana to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Montana to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Montana to Illinois is Boeing 737-800 (30.76% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (15.49%), Embraer 175 (12.33%), and Embraer 175 (Enhanced Winglets) (12.19%).
Best airlines flying from Montana to Illinois
Compare and see reviews for airlines that fly from Montana to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $197 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $205 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 7,965 reviews | |||
| PriceFrom $238 | Free Cancellation | Rating 7.4 8,809 reviews | |||
| PriceFrom $388 | Free Cancellation | Rating 8.0 4,280 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Montana to Illinois?
Finding the right flight to Illinois from Montana is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.
Can I find flights from Montana to Illinois with flexible booking policies on momondo?
Flights from Montana to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Montana to Illinois?
momondo provides multiple filters to help you find the best flight to Illinois from Montana. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Montana to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Montana. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.