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 | $29 |
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, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Tuesday
Aer Lingus, Air Canada, American Airlines, +15 more
Aer Lingus, Air Canada, +16 more
14
15
Wednesday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
Thursday
Aer Lingus, Air Canada, American Airlines, +15 more
Aer Lingus, Air Canada, +16 more
14
15
Friday
Aer Lingus, Air Canada, American Airlines, +17 more
Aer Lingus, Air Canada, +18 more
16
17
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
Direct returns
Denver Intl to Chicago
Monday
Aer Lingus, Air Canada, American Airlines, +15 more
Aer Lingus, Air Canada, +16 more
14
15
Tuesday
Aer Lingus, Air Canada, American Airlines, +14 more
Aer Lingus, Air Canada, +15 more
13
14
Wednesday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Thursday
Aer Lingus, Air Canada, American Airlines, +14 more
Aer Lingus, Air Canada, +15 more
13
14
Friday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Saturday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
Sunday
Aer Lingus, Air Canada, American Airlines, +16 more
Aer Lingus, Air Canada, +17 more
15
16
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 😮.
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
Flight was delayed more than 2 hour do the scheduling issues and then some confusing weight and balance matters, followed by a miscommunication with the tower on which runway was going to be used based on the airplane weight. All these things should have been figured out in advance. Instead of arriving at 12:30 a.m. we arrived at 2:30 a.m. very difficult to find a taxi or other transport at SFO. Luggage was delayed. An extension of an unpleasant flight 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?
Typically I give delta excellent reviews. Our flight was delayed 2hrs, I was one of the fortunate ones who were able to get to my connecting flight. Also, annoying that on the connecting flight boarding personnel make me put away a small bag into my carryon. It small enough to put in back pocket seat, why hold me and the line up to just push it into my carryon.
Everything was great. Great service, excellent communication, and early arrival
Delta flight attendants poorly managed the boarding process and overhead storage. My bag was checked last minute and no claim ticket was provided. My bag is now lost. Complete incompetence by all flight crew involved.
Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.
Customer service at the gate in the flight was exceptional. On time. Aircraft and seat was decent. Thanks Delta. 💗
It was terrible, if they ran flights on time it would make a big difference.
Great flight. On-time, comfortable, clean aircraft, and offered snacks pre-flight to plan for a potentially turbulent route. I wish there was Wi-Fi an all Delta Aircrafts but for a short flight this is not much of a problem.
Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.
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.
Pleasant service from the crew. Arrived early. Efficient boarding and deplaning. Great job!
Everything was perfect except the pad at the top of the seat back. It pushes my head forward in a very uncomfortable position and it is not removable.
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
Smoothe flight. Pilot and crew did a great job. Uncomfortable seat in this jet, felt worn out
seats were way too small. Too short of a flight to offer amenities.
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
Frontier is definitely a good option for people traveling light or on a budget - just remember to bring your own entertainment and your own headphones if you need them.
The plane was very clean, the flight attendants were chipper and accommodating. It was roomy
Average price | Average duration | |
---|---|---|
Flights | $424 | 2h 41m |
Trains | $252 | 18h 37m |
Buses | $376 | 29h 00m |
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