ORD - DEN

$103 Find Cheap Flights from Chicago O'Hare Airport to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from O'Hare Intl to Denver departing on 9/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Denver.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Denver.
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Everything you should know

Cheapest round-trip
$171
Typical prices: $159-$293
Frontier
Tue 8/4Thu 8/6
ORD - DEN • Non-stop
Cheapest one-way
$103
Typical prices: $108-$239
Frontier
Tue 9/8
ORD - DEN • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier Economy Bundle adds a carry-on and seat choice; United Economy Plus adds legroom.
Southwest includes a free carry-on; American Main Cabin Extra adds early boarding.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $171 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with American Airlines, Frontier and United Airlines. Average duration is 2h 52m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 83% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 38% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 23% price drop
Most popular
Good to know
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+1
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We hope you love your trip to Denver!
Flight Deals
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Flight Deals

Cheap Flights from O'Hare Intl to Denver (ORD-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from O'Hare Intl to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from O'Hare Intl to Denver

Tue, Aug 4 - Thu, Aug 6
Frontier Logo
9:57 pm - 11:57 pm
ORD
-
DEN
3h 00mnonstop
Frontier Logo
5:05 pm - 8:52 pm
DEN
-
ORD
2h 47mnonstop
$171Frontier
Sat, Sep 5 - Tue, Sep 8
Frontier Logo
9:48 pm - 11:54 pm
ORD
-
DEN
3h 06mnonstop
Frontier Logo
9:06 pm - 9:34 pm
DEN
-
ORD
23h 28m
1 stop
$172Frontier
Tue, Jul 21 - Wed, Jul 22
Frontier Logo
9:57 pm - 11:57 pm
ORD
-
DEN
3h 00mnonstop
Frontier Logo
5:05 pm - 8:52 pm
DEN
-
ORD
2h 47mnonstop
$173Frontier
Fri, Sep 4 - Sun, Sep 6
Frontier Logo
2:41 pm - 4:45 pm
ORD
-
DEN
3h 04mnonstop
Frontier Logo
9:55 am - 1:36 pm
DEN
-
ORD
2h 41mnonstop
$174Frontier
Wed, Jul 8 - Sat, Jul 11
Frontier Logo
9:57 pm - 11:57 pm
ORD
-
DEN
3h 00mnonstop
Frontier Logo
5:05 pm - 8:52 pm
DEN
-
ORD
2h 47mnonstop
$175Frontier
Mon, Jul 27 - Fri, Jul 31
Frontier Logo
9:57 pm - 11:57 pm
ORD
-
DEN
3h 00mnonstop
Frontier Logo
5:05 pm - 8:52 pm
DEN
-
ORD
2h 47mnonstop
$176Frontier
Fri, Oct 2 - Sun, Oct 4
Frontier Logo
10:40 pm - 12:29 am
ORD
-
DEN
2h 49mnonstop
Frontier Logo
5:56 pm - 9:35 pm
DEN
-
ORD
2h 39mnonstop
$177Frontier
Wed, Aug 19 - Sun, Sep 20
Frontier Logo
9:48 pm - 11:54 pm
ORD
-
DEN
3h 06mnonstop
Frontier Logo
10:29 am - 5:42 am
DEN
-
ORD
18h 13m
1 stop
$178Frontier
Tue, Jul 7 - Sat, Jul 11
Frontier Logo
9:57 pm - 11:57 pm
ORD
-
DEN
3h 00mnonstop
Frontier Logo
5:05 pm - 8:52 pm
DEN
-
ORD
2h 47mnonstop
$179Frontier
Wed, Jul 29 - Tue, Aug 4
Frontier Logo
9:57 pm - 11:57 pm
ORD
-
DEN
3h 00mnonstop
Frontier Logo
5:05 pm - 8:52 pm
DEN
-
ORD
2h 47mnonstop
$180Frontier
Booking Insights

KAYAK's insights & trends for O'Hare Intl to Denver flights

Get data-powered insights and trends into flights from O'Hare Intl to Denver to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Chicago O'Hare Intl Airport to Denver?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Chicago O'Hare Intl Airport to Denver departing in August.

What’s the cheapest day of the week to fly from Chicago O'Hare Airport to Denver?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to Denver clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Chicago O'Hare Airport to Denver, look for departures on Wednesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Denver, Thursday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Chicago O'Hare Intl Airport to Denver is September, where tickets cost $186 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $302 and $284 respectively.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Chicago O'Hare Intl Airport to Denver, you should book around 4 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Expert advice

Expert advice for your flight from O'Hare Intl to Denver

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Frontier and ORD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on American Airlines and DEN

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Good to know

Low seasonJanuary
Cheapest flight$103
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Chicago O'Hare Airport to Denver

When to book flights from O'Hare Intl to Denver

Are your dates flexible? Find out the best times to travel from O'Hare Intl to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Chicago O'Hare Airport to Denver flights

  • Can I travel from Chicago O’Hare Airport (ORD) to DEN with a pet?

    Chicago O’Hare Airport (ORD) is pet friendly and ensures that you and your furry friend have the best experience. There are pet relief areas in the departure and arrival airports with cleaning materials. ORD, however, requires you to leash your pet. You can find the pet relief areas inside security in Terminal 3 Rotunda and outside security. You can contact your airline to inquire about their policies regarding traveling with an animal.

  • Where can I eat in ORD?

    You can find various restaurants in the airport to grab a quick meal before your flight. While you can find most restaurants past security, you can find a few before security. To make your traveling experience more interesting, the airport has ensured that you get different local dining options.

  • Where can I stay in DEN?

    You can stay at the Westin Denver International Airport Hotel, situated just a few steps from the main terminal. It is convenient and offers respite to travelers. The hotel provides shuttle services from the airport to the hotel. You can also stay in one of the many hotels within 10 miles of the airport, such as Aloft Denver International Airport, Avid Hotel Denver Airport, Baymont Inn & Suites, and Clarion Hotel Denver Central.

  • Is DEN accessible to people with reduced mobility?

    The airport has partnered with the Hidden Disabilities Sunflower organization, which provides people with disabilities with a green lanyard with sunflowers to signal that they may need special assistance. The parking lots at the airport are accessible and fitted with elevators and ramps.

  • What is the cheapest flight from Chicago O'Hare Intl Airport to Denver?

    In the last 5 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Denver was $103 for a one-way ticket and $171 for a round-trip.

  • Do I need a passport to fly between Chicago O'Hare Airport and Denver?

    A passport is not required to fly from Chicago O'Hare Airport to Denver.

  • Which airlines offer Wi-Fi service onboard planes from Chicago O'Hare Airport to Denver?

    American Airlines, JetBlue, Alaska Airlines, and Delta offer inflight Wi-Fi service on the Chicago O'Hare Airport to Denver flight route.

  • Which aircraft models fly most regularly from Chicago O'Hare Airport to Denver?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Chicago O'Hare Airport to Denver flight route.

  • Which airline alliances offer flights from Chicago O'Hare Airport to Denver?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Chicago O'Hare Airport and Denver, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Chicago O'Hare Airport to Denver?

    There are nonstop flights from Chicago O'Hare Airport to Denver on a daily basis.

  • Which is the best airline for flights from Chicago to Denver, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Chicago to Denver are Southwest and Delta. With an average price for the route of $268 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $358 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Chicago O'Hare Airport to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago O'Hare Airport to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago O'Hare Airport to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Chicago O'Hare Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago O'Hare Airport to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Chicago O'Hare Airport with another airline. Booking your flights between Chicago O'Hare Airport and DEN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago O'Hare Airport to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Chicago O'Hare Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Chicago O'Hare Intl Airport to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $145 or less one-way and $247 or less round-trip.
  • The Chicago O’Hare Airport can be accessed using a myriad of transit options. It is easy to get to the airport using the Airport Transit options, taxis, buses, car rental, or train. If you are looking for a fast and convenient way to the airport, we recommend using a taxi.
  • Chicago O’Hare Airport (ORD) is friendly to nursing mothers, offering them a lovely nursing lounge. The rooms are finished and lovely, with a private chair and a sink area giving a personal space for mothers to breastfeed and breast pump. You can find the nursing area in Terminal 3 Rotunda.
  • You can park in the ORD airport-provided parking spaces at a fee for short-term or long-term. You do not have to worry about the safety of your vehicle because the airport ensures security and safety. The Economy Lot G is the cheapest option if you are parking long-term.
  • There are many direct flights serving this route. All the following airlines operate direct flights along this route: American Airlines, Brussels Airlines, Cathay Pacific Finnair, Copa Airlines, Royal Jordanian, Austrian Airlines, Air Canada, Aer Lingus, Qatar Airways, British Airways, Gulf Air, Iberia, and Japan Airlines. You can find an airline that is within your budget and needs.
  • Denver International Airport (DEN) provides a unique and elegant space to improve your traveling experience. Enjoy the amenities and services by the airport before leaving. You can access free Wi-Fi, charging stations, nursing rooms, and an interfaith chapel.

Prefer to fly direct from Chicago O'Hare Airport to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Chicago O'Hare Intl to Denver Intl.
Find which airlines fly direct from Chicago O'Hare Intl Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

Chicago O'Hare Intl to Denver Intl

Monday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Tuesday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Wednesday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Thursday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Friday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Saturday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Sunday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

See more direct flights

Direct returns

Denver Intl to Chicago O'Hare Intl

Monday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Tuesday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Wednesday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Thursday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Friday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Saturday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

Sunday

American Airlines,Frontier,United Airlines

American Airlines,Frontier, +1 more

See more direct flights

Reviews of the top 5 airlines serving from O'Hare Intl to Denver

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from O'Hare Intl to Denver? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4241 reviews
8.0Comfort
7.0Food
8.6Crew
8.1Boarding
7.5Entertainment
Airline reviews

Over a 3 hour flight. The turbulence was almost imperceptible except for 2 short periods which were not bad and over quickly. The attendants claimed "Safety first" and sat looking at their phones for 3 hours with no drink or snack service. This isn't the first time with Southwest. I thinkit may be there new plan of operation. Oh, and it was June 18, Southwest's Birthday which offered free drinks. NOT.

4.0 OkayJeff, Jun 2026
MCI - FLL
Read more Southwest reviews

Over a 3 hour flight. The turbulence was almost imperceptible except for 2 short periods which were not bad and over quickly. The attendants claimed "Safety first" and sat looking at their phones for 3 hours with no drink or snack service. This isn't the first time with Southwest. I thinkit may be there new plan of operation. Oh, and it was June 18, Southwest's Birthday which offered free drinks. NOT.

Flight was delayed, full flight and I had to change gates. Southwest flights are always late later in the day.

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

Significant delays on my trip to Chicago and my trip back to NY

Delayed by 5 hours and I had to wit in the airport for more than 6+ hours.

I’ve got 31F seat and window seat . My 2 co passengers was AA crew members and they were very rude attitude and when I was going to use bathroom their gestures was very different and awkward and the guy beside me completely occupied the hand rest and I was really uncomfortable

It was so much better than expected, Ohare is not such a pleasant experience but American Airlines with the new, clean aeroplane and free Wi-Fi was outstanding and the crew so pleasant and helpful.

It wa sort of on time; the cab was left with some trash

American Airlines II: Delay Boogaloo. Multiple gate changes, delays, boarded and then MORE delays. I hate to say this won’t matter, but posting stuff about major corporations in 2026 is a post-modern “scream into the void.” Was multiple hours late coming home, so there you go.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Original flight was on time, then late, then changed gates...4 times. Once our newest plane came in, it was fine.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

I almost missed my flight and they helped me out enormously

The aircraft was fine, it’s was just the service. The flight got canceled several times and that was very inconvenient for my 69 years old mom.

My checked in luggage cost was $59, almost ticket price. The first 13 rows were empty, but fly attendant did not alow women with little boy change her middle sit, sweet boy was crying, I am so sorry for mother and passengers. At the end of the flight the cabin became impossible cold. Only good was timing of departure and early landing, but it suppose to be normal.

I tried to book a flight with Jet Blue. Your third party company hijacked my attempt with a website that looked like I was booking with Jet Blue. I realized it when I paid. I tried to cancel and was told by a man in India that there were no refunds. $735 stolen, Thanks Kayak!

It was inexplicably canceled and we are stuck in LA, haven't gotten home and it has been an inconvenience having lost work (on unpaid leave for my husband).

JetBlue worker, Blythe, was so amazing at the DCA counter. If it wasn’t for her, I’m not sure we would’ve made it through. Please thank her!

They lost my luggage and refuse to help. Terrible airline. I've never experienced worse customer service in my life. Pretty much just told me too bad that I lost all my luggage, not caring that I am stuck in Europe for 2 weeks with absolutely nothing.

You should have had Wifi to make it much enjoyable.

The flight out was delayed from 3:40pm to 5pm and again to 8pm. We boarded after 5pm, had to disembark because they could not get the Engine started, then we switched gates and got a new plane and did not board until after 8pm.

The flight was delayed after already taxiing from the gate due to a malfunction. After 3 hours we were told the flight was canceled. The next flight available was Sunday. My daughter and I stayed overnight in the airport due to this issue. I was given a $12 meal voucher. Unacceptable

Whole experience was poor. Delayed 2 hours. Lied about the delays. Was all jet blues fault and tried to blame on air traffic control. Sent out other let trips and wouldn't allow people to switch aircraft.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Better than expected. Staff were friendly and nice on both flights.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

Everything you need to know for your flight from O'Hare Intl to Denver

Other airlines flying from O'Hare Intl to Denver

Flights from the other most popular airlines that fly from O'Hare Intl to Denver according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.