Economy Bundle includes a carry-on bag and seat choice, ideal for budget travelers.
Premium Bundle offers priority boarding and extra legroom for just $20 more.
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Planning a trip from Chicago to Denver? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.
When planning a trip from Chicago to Denver, it's important to consider the day of the week and month you choose to fly. Generally, Tuesdays and Saturdays are the cheapest days to fly, while April and May offer the most affordable monthly rates.
Cheapest Route: Opt for flights from Chicago Midway (MDW) to Denver (DEN) for the most cost-effective route.
Booking Advance: Book your flight at least 16 days in advance to get the best deal.
Budget Airline: Frontier Airlines typically offers the cheapest fares for this route.
Flight Type: Direct flights are generally cheaper than those with a layover for this particular route.
This feature is powered by ChatGPT: an OpenAI-developed artificial intelligence model trained with KAYAK proprietary data and third-party data not verified by KAYAK.
Low season | January |
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High season | July |
Cheapest flight | $27 |
Find which airlines fly direct from Chicago to Denver Intl Airport, which days they fly and book direct flights.
Direct departures
Chicago to Denver Intl
Monday
Aer Lingus, Air Canada, American Airlines, +18 more
Aer Lingus, Air Canada, +19 more
17
18
Tuesday
Air Canada, American Airlines, British Airways, +16 more
Air Canada, American Airlines, +17 more
15
16
Wednesday
Air Canada, American Airlines, Austrian Airlines, +17 more
Air Canada, American Airlines, +18 more
16
17
Thursday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
Friday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
Saturday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
Sunday
Aer Lingus, Air Canada, American Airlines, +18 more
Aer Lingus, Air Canada, +19 more
17
18
Direct returns
Denver Intl to Chicago
Monday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
Tuesday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Wednesday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
Thursday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Friday
Aer Lingus, Air Canada, American Airlines, +15 more
Aer Lingus, Air Canada, +16 more
14
15
Saturday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Sunday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.
I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.
For the first time in a long time we had a flawless experience with Southwest. Both flights were early and no mechanical errors at all. We were shocked and pleasantly surprised 😮.
One of the crew performed a hilarious skit to accompany the standard instructions. Passengers enjoyed it so much they applauded at the end!
Excellent experience. WiFi worked on this leg of My trip
It was really nice! I appreciate the gate attendant allowing families with small children to board early on in the process… that was very helpful! The internet service didn’t work with the app I was trying to use even though I paid the $8… other than that it was great! Oh and I should’ve asked for the whole cranberry cocktail can. That cup was about 2 sips…
I love no assigned seats and bags fly free. If Private Equity gets their way and forces Southwest to change they will be everyone else and I will stop being loyal to them. DON'T CHANGE YOUR BUSINESS MODEL!!!
wifi wasn't working correctly so couldn't watch live tv
Flight was delayed by 12 minutes. Boarding wasn’t fun. The crew was nice though.
Crew always seems to be unprofessional no matter what Southwest flight I fly
The 700 model seating is too tight both seat size & leg room
Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.
Flight left early and arrived early. the whole trip was excellent.
Seats were really tight and the seat belts did not give enough slack.
I like in St George and prefer to fly out of CDC than SGU. Hopefully, they will continue the flights out of Cedar
Broken jer bridge. Poor communication about it. Lost 2 of 4 luggage pieces
Overall, it was okay. Seat was a little cramped. Would’ve liked more substantial snacks or opportunity to buy some.
Newer plane, relatively easy boarding, not a full flight and was told that we could not be moved up because of weight and balance issues. Otherwise, a very good experience.
Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.
I was with one of the last zones to board. It was kind of annoying to finally get called to board and my whole section was already on the plane. Clearly they boarded with previous zones. So by the time I got on board, there were no spaces for my luggage above my head. I had to put my luggage 4+ rows behind me, which meant that I had to wait even longer to get off the plane, since I had to wait for those rows to clear the aisle before I could retrieve my luggage and exit the plane. This also held up the plane cleaners, as they couldn't service my row until I cleared it, so they were all standing there waiting for me, while I'm standing there waiting for the other passengers to clear the aisle. Anyways, I wasn't in a rush this time, so I just waited, but I could see that being a problem in the future. Now, I could have checked my luggage, of course, but coincidentally, a friend of mine on the same flight got their luggage damaged (wheel completely knocked off) and was told by the Baggage Attendant in the airport that Delta doesn't "cover wheel damage" on luggage. This was disappointing to hear. I'm glad I didn't check mine through. If it were my luggage, I'd be highly frustrated to hear that. It makes me not want to check my luggage in the future.
The dear was very limited in space. I could put my water bottle in seat basket. Also, there was no inflight entertainment in the delta app?
I liked all the informational texts. I always knew where to go and when .
Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.
The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.
It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.
The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.
The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.
Flight was 3 1/2 hour delayed with no credit or meal vouchers
late departure due to some unspecified issue with ventilating the cabin. They got it running but it was FREEZING for the whole flight. I asked for a blanket but they didn't provide one. They could not turn up the heat. it was quite miserable.
Liked that we left on time for each flight. Snacks not the best, but we're okay.
It was fine. The flight attendant appeared to be in a bad mood but everything was fine.
Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.
You were more on time than United. I'm so over united delays.
The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.
I chatted with the captain before the flight, and similarly during the welcome announcement, he warned of a turbulent flight that may impact the in-flight service. However, once at altitude, he announced that the weather changed and he immediately turned off the seatbelt sign. But it appeared the cabin crew had already decided to take off this flight. They remained seated and then just chatted in the galley. The flight was fully catered, but only first class received service.
My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks
My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..
I had a TERRIBLE experience with the AA crew. I believe it was disability-related. It’s unlikely I will fly AA again.
Baby cried a lot. Nothing anyone could do about it. Just part of flying.
The flight crew was fantastic! Which the seats had a small TV.
The flight was delayed till next day ! They kept delaying every 30 minutes then after 3 hours they delayed it till next day. We kept waiting in line standing more than an hour to get the hotel and meal vouchers. There was no communication at all. Everything was bad
I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.
The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.
Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?
Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.
Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.
Stuck in Phoenix for two days, not even a hotel voucher offered.
Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy
Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...
Both flights were delayed. The sizing of bags is crazy. I know it is advertised as a no frills cheaper option but it does feel like you are being extorted for money the whole way-- $20 dollars to talk to a gate agent? Charging for soda a pretzels? I don't think I will be flying Frontier again if I can help it. That said, all the staff were wonderful.
Staff members pretty horrible when boarding. No care for customers
Average price | Average duration | |
---|---|---|
Flights | $425 | 2h 45m |
Trains | $160 | 18h 41m |
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