Cheap flights from Denver to Illinois from $37
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Illinois departing on 4/10. 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 Denver 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 Denver is in September. Flight prices, which tend to average around $140, 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 September, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $151.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Denver to Illinois is on a Friday when prices can be found for as low as $284. Flights from Denver to Illinois on a Sunday will generally be more expensive and average around $516. 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 evening. Flights from Denver to Illinois during this time can be as low as $168. Flights at noon are often more expensive with an average ticket price of $701.
What is the cheapest Denver Intl to Illinois flight route?
Fly from Denver Intl to Chicago Midway for the best Denver Intl - 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 Denver when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $212 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Denver for as low as $178 on momondo.
What cabin class options are available on Denver Intl to Illinois flights?
There are 4 cabin classes available to choose from on Denver Intl 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 Denver Intl to Illinois?
Frontier, Allegiant Air, and Southwest are the most popular carriers operating from Denver Intl to Illinois
What airlines fly to Illinois?
Frontier, United Airlines and American Airlines are the top three most popular airlines that fly to Illinois from Denver according to our data. Frontier is the first choice among our users, with 38% 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 Denver to Illinois on average per day?
The number of flights available between Denver and Illinois is 58 per day as of March 2025. The most frequent departure time is 7:00AM, with 47% of daily flights leaving in the afternoon.
How many flights depart from Denver to Illinois on average per week?
As of March 2025, 412 flights take off from Denver and land in Illinois each week. The most common flight departure day for this route is Thu, with 18% of weekly flights taking off on this day.
Cheap Denver to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Denver to Illinois
When did momondo last update prices for flights from Denver Intl Airport to Illinois?
Prices for flights from Denver Intl Airport to Illinois are updated daily.
How many operators does momondo search for flights from Denver Intl Airport to Illinois?
The number of operators available for flights from Denver Intl Airport to Illinois is 5 as of March 2025.
How old do you have to be to fly from Denver Intl Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Denver to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Denver to Illinois is Airbus A321neo, representing 10.54% of all bookings. The subsequent popular models are Airbus A320neo at 10.43%, Boeing 737-800 Passenger/BBJ2 (winglets) at 9.98%, and Boeing 737 MAX 8 at 9.97%.
Best airlines flying from Denver to Illinois
Compare and see reviews for airlines that fly from Denver to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $43 | Free Cancellation | Rating 6.0 3,292 reviews | |||
| PriceFrom $84 | Free Cancellation | Rating 7.2 736 reviews | |||
| PriceFrom $142 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $145 | Free Cancellation | Rating 7.4 8,623 reviews | |||
| PriceFrom $155 | Free Cancellation | Rating 8.0 4,292 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Denver to Illinois?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Denver to Illinois for you.
Can I find flights from Denver to Illinois with flexible booking policies on momondo?
momondo does allow users to show only those flights to Illinois from Denver which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Denver to Illinois?
Once all potential Denver to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Denver to Illinois right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Denver to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.