Find Cheap Flights from Chicago to Denver

Pros: No problems

Cons: A little behind

Cons: I was unable to catch my flight because of Spirit's unreasonable polocies. On paper it seems like a good airline, but in practice there's a lot of dissapointment.

Cons: The flight attendants weren’t that friendly

Pros: Flight was ahead of schedule. Loading and unloading was efficiently done.

Cons: No complimentary glass of water. Baggage unloading seemed to take a long time.

Pros: Everything ran seamlessly, I even arrived early on my flight back.

Cons: The seats seem to be getting narrower and make for a very uncomfortable trip.

Pros: Fast boarding and that's the only good quality. No refreshments or snacks offered without a price tag included. Seats don't recline. Uncomfortable hard seats without any head rests for Support. Small tray tables that won't hold a laptop or drink.

Cons: It's been 45+ minutes after landing that we have been stuck on the runway unable to dock the plane due to some delays. How Terrible is it that the pilot gets on the radio to say he has no updates or much information to give! People are antsy, children crying and this delays all passengers with other accommodations. Seems like there's no communication or organization from Frontier at all!!'

Pros: What I liked? That the flight ended and I could get off the plane.

Cons: They charged to pick seats. They charged to carry on a bag. They charged for any drinks. The seats had NO padding. The seats didn't recline. The gate at O'Hare was dark and dirty. The travelers in my flight would have scared the residents of Mos Eisley.

Cons: Chairs were uncomfortable and didn't recline. Tray tables were tiny! And didn't even pull closer. no beverage service was offered. Personal passages controlled Lights in cabin were not useful and obnoxious color.

Cons: Flight was delayed by 2 hours.

Cons: The aircraft was freezing. The water was not complementary and I didn’t have a card to pay with I only had cash. The seat was extremely hard and uncomfortable. The flight was last taking off and landing.

Pros: As far as flights go it was pretty ez.

Cons: $50 carry on fee caught me off guard. I assumed it was 20 or 30...but that’s my fault for assuming.

Cons: Sitting at gate for 30 min unable to exit plane. Nightmare

Pros: nothing

Cons: 10 hours late-lied to from staff-spent hours on tarmac-No bag at destination

Pros: Nothing

Cons: We were delayed and received no update prior to arriving at the airport. Our gate was changed suddenly just before boarding time and then waited an additional 30 minutes to board with no information. We then sat on the plane for about 30 minutes, doors locked not moving, again no information. I did finally receive an email update that our flight was delayed after we'd boarded the plane. We are now landed in Denver and just sitting on the plane not moving pushing 40 minutes, what a suprise-with no information.

Pros: Crew was very pleasant. We were able to board easily. Like the newer seats that don't take up so much space so there is more leg room.

Cons: Cabin was freezing, until one of the crew came back and adjusted it.

Pros: The Busch league pretzels I didn't get because the flight got cancelled.

Cons: Not a fan of flights getting canceled with great weather on both sides and other Frontier lines taking off. Pay the extra for American; at least it will leave on time.

Pros: Nothing. I was treated so poorly I walked away from their customer service and bought a ticket on another airline.

Cons: I was 5 minutes late over their 45 minute required check in window. So they cancelled my ticket. For $100 they offered to reschedule me. And for another $50 they would check my bag. On a different airline I paid another $100 and got a complete round trip ticket, about 10 minutes later.

Cons: Flight delayed 2 hours. Sat on the plane for an hour of that delay.

Pros: The option to have the first row with more comfort. The crew was nice.

Cons: I'm upset that my bag came back broken. I've checked my bag several times with American and this never happened. Needless to say; this is my first and last time. It only takes one bad experience to lose a customer.

Pros: nothing

Cons: Flight was delayed, Woman had an intact male Pit bull as a service dog ( therapy dog). The dog acted up 3 times in waiting area I do not know why they would let that dog in the cabin?

Pros: everything went just as planned, everyone with Frontier was on point

Cons: $45.00 for a bag is rediculous.

Pros: It was cheap. The boarding was smooth. It wasn't overbooked. There was space for my carryon. Crew was nice. Was on time.

Cons: No free beverage. Small seats and no leg room. Not happy about the carryon charge but whatever.

Pros: Nothing

Cons: We were delayed and received no update prior to arriving at the airport. Our gate was changed suddenly just before boarding time and then waited an additional 30 minutes to board with no information. We then sat on the plane for about 30 minutes, doors locked not moving, again no information. I did finally receive an email update that our flight was delayed after we'd boarded the plane. We are now landed in Denver and just sitting on the plane not moving pushing 40 minutes, what a suprise-with no information.

Cons: Nothing about this flight was relaxing or welcoming! The staff was extremely rude. To check a bag in its way over priced. I asked for a cup of water in which I was told it would be three dollars for a bottle of water . WATER! The seats on the plane were extrmemly uncomfortable. Overall I would never recommend nor fly spirit again.

Pros: The option to have the first row with more comfort. The crew was nice.

Cons: I'm upset that my bag came back broken. I've checked my bag several times with American and this never happened. Needless to say; this is my first and last time. It only takes one bad experience to lose a customer.

Pros: I arrived safe in Denver

Cons: Pay to sit with my children?? Family friendly??

Cons: Spirit airlines cancelled my flight the day of travel.

Cons: Canceled my flight at the first hint of weather, next available was 24 hours later. To their credit, the ticket counter crew was quick to refund my money.

Cons: Delayed 2 hrs

Cons: Luggage charge way too much Crew not friendly or even particularly hospitable

Pros: Not one thing

Cons: Seats are awful. No WiFi! No water! Have to pay for water!!? What!! Made me pay for my bag that I took for free with me to Chicago. Never ever

Pros: everything went just as planned, everyone with Frontier was on point

Cons: Avoiding the 40 minute taxi at departure, and finding better staff. We encountered the worst gate attendant and rude crew members who didn’t sympathize us traveling as a party of 7, with two young infants and one disabled adult.

Pros: We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

Cons: Seats are hard and our row was not allowed to recline. Late take off and late landing, plus we did not have a gate for 20+ minutes after landing. Crew acted like they wanted to be somewhere else.

Pros: I like nothing about it and the customer service sucked

Cons: I hated everything about spirit I was waiting at my gate for about an hour until they announced all last minute that our gate had changed and the flight was boarding when I went over to the new gate there was no one there and the flight had left! 8 people experienced the same thing and missed their flight. The manager who came to save us was rude and did absolutely nothing about it. I had to find another flight on my own and pay extra and reschedule my car rental and hotel reservations. By far the worst experience I've had at the airport please don't be cheap and think you are saving with spirit, they are a headache and worst service ever!!

Cons: You have to pay for food and drink which is extremely expensive if you don't bring something with you on the plane

Pros: Very comfortable! Fun crew! Coffee!

Cons: Canceled my flight at the first hint of weather, next available was 24 hours later. To their credit, the ticket counter crew was quick to refund my money.

Cons: Wifi didn't work

Pros: Diverted for unclear reasons. Stuck in TSY with hotel voucher to an overbooked hotel; trying to find out of pocket accommodations after long day of no food at MIDNIGHT was a real downer! I’ll let ya know if I make it home TODAY!!!

Pros: Crews were friendly

Pros: Everything. Always an excellent and professional experience.

Cons: Nothing

Pros: everything went just as planned, everyone with Frontier was on point

Pros: Every thing was good

Cons: Safe and it was on time

Pros: Steamboat Springs, CO There were many CUBS fans on this flight! Good to leave rainy Chicago & arrive in dry Denver! Even though the plane was late, I was still able to catch my Alpine Taxi to Steamboat!

Cons: There should be a way to know when the bathroom is available!

Pros: It was very good! I liked it.

Pros: They were great & super friendly!!

Pros: Despite boarding late, and sitting on the tarmac for half an hour since we missed our take off time, and having to move passengers around to balance the weight on the plane, we made it home alive.

Cons: We landed over half an hour late. Flight attendants needed to move passengers to balance the weight on the small plane, and asked for "volunteers." When there were none, the FA stood in the aisle and said we just weren't going to take off if nobody volunteered. They should have just MOVED people.

Cons: Flight was delayed and we missed our connection. Wondering why all the shuttles were parked and unavailable when you knew there were connection s that were tight.

Pros: The delta crew both ways between Portland and London was excellent! They saw to our every need and were smiling every air mile of the way. Plane

Cons: Need to have food choices available for those with allergies. Almost everything had gluten and soy in it and I am very allergic to those. I had to give away all snacks and most of my food. Even in comfort+ class the seats are tiny with little legroom. Also, please clean the bathroom every few hours

Pros: Crew was great

Cons: Gluten free snacks like peanuts

Pros: It was efficient loading.

Cons: We were diverted to Phoenix due to weather. They have no flights to Orlando from Phoenix. Because of this, we were going to have to fly the next day or get another connecting flight. In the meantime, they cannot find our luggage. Apparently, SouthWest doesn’t have a tracking system for luggage!

Cons: The seats are small but I'm also a big dude so that might be a factor

Cons: Seats are horrible

Pros: Although the plane was delayed, the staff did want they could to get us to our destination as quick as they could.

Cons: Delayed flight, which was fine but didn't update passengers as to why until we boarded plane. I didn't appreciate that as a customer. Questionable if I'll be a return customer in the future.

Cons: The flight attendants weren’t that friendly

Cons: The aircraft was freezing. The water was not complementary and I didn’t have a card to pay with I only had cash. The seat was extremely hard and uncomfortable. The flight was last taking off and landing.

Cons: Sitting at gate for 30 min unable to exit plane. Nightmare