Cheap flights from Illinois to Denver from $63
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Denver departing on 8/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Illinois to Denver
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
American Airlines flights from Illinois to Denver
Our best American Airlines deals on Illinois to Denver flight tickets
Delta flights from Illinois to Denver
Our best Delta deals on Illinois to Denver flight tickets
See travel insights to Denver from
How to get the cheapest flight ticket from Illinois to Denver
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 Denver?
The cheapest month to fly to Denver from Illinois is in September. Flight prices, which tend to average around $153, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in September, then you should wait until November to fly from Illinois, when ticket prices are also cheap, with an average price of $157.
What is the cheapest day to depart on your flight to Denver?
The cheapest day to depart on your flight to Denver is on a Wednesday when prices can be found for as low as $226. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $307.
What is the cheapest time of day to depart on your flight to Denver?
The cheapest time of day to fly to Denver is in the afternoon when flights can be purchased for as low as $210. Flights at noon are often more expensive with an average ticket price of $287.
What is the cheapest Illinois to Denver Intl flight route?
Fly from Chicago Midway to Denver Intl for the best Illinois - Denver Intl flight prices
How far in advance should I book a flight to Denver?
You are more likely to see cheaper flights to Denver from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $211 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Illinois for as low as $175 on momondo.
What cabin class options are available on Illinois to Denver Intl flights?
There are 4 cabin classes available to choose from on Illinois to Denver Intl 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 Illinois to Denver Intl?
Allegiant Air, Frontier, and American Airlines are the most popular carriers operating from Illinois to Denver Intl
What airlines fly to Denver?
Frontier, United Airlines and American Airlines are the top three most popular airlines that fly to Denver from Illinois according to our data. Frontier is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 6 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to Denver on average per day?
As of June 2025, 79 flights take off from Illinois and land in Denver each day. The most common flight departure time for this route is 6:00PM, with 33% of daily flights taking off at noon.
How many flights depart from Illinois to Denver on average per week?
As of June 2025, there are 553 flights per week flying from Illinois to Denver. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.
Cheap Illinois to Denver flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Denver
When did momondo last update prices for flights from Illinois to Denver Intl Airport?
Prices for flights from Illinois to Denver Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Denver Intl Airport?
As of June 2025, there are 6 operators available to choose from for flights from Illinois to Denver Intl Airport.
How old do you have to be to fly from Illinois to Denver Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to Denver?
momondo data reveals that the most frequently booked plane model on the route from Illinois to Denver is Airbus A321neo, representing 12.75% of all bookings. The subsequent popular models are Boeing 737-800 at 11.22%, Boeing 737 MAX 8 at 10.74%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 8.49%.
Best airlines flying from Illinois to Denver
Compare and see reviews for airlines that fly from Illinois to Denver with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $48 | Free Cancellation | Rating 5.9 3,301 reviews | |||
| PriceFrom $90 | Free Cancellation | Rating 7.3 722 reviews | |||
| PriceFrom $152 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $157 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom $159 | Free Cancellation | Rating 8.0 4,280 reviews | |||
| PriceFrom $228 | Free Cancellation | Rating 8.0 7,964 reviews |
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Illinois to Denver?
It is quick and easy to find Illinois to Denver flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Denver that suits you.
Can I find flights from Illinois to Denver with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Illinois to Denver flights to just show those with flexible booking policies.
How can momondo help me find flights from Illinois to Denver?
momondo helps you find the best flight between Illinois and Denver by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Illinois to Denver right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Denver from Illinois. 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.