CHI - DEN

$66 Find Cheap Flights from Chicago 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 Chicago to Denver departing on 10/5. 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

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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Denver, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Chicago to Denver (CHI-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago 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 Chicago to Denver

Tue, Sep 23 - Tue, Sep 23
Frontier Logo
7:20 am - 9:13 amORD-DEN
2h 53mnonstop
Frontier Logo
5:50 pm - 9:28 pmDEN-ORD
2h 38mnonstop
$98Frontier
Find Deal
Fri, Sep 19 - Mon, Sep 22
Frontier Logo
3:48 pm - 5:32 pmMDW-DEN
2h 44mnonstop
Frontier Logo
12:28 pm - 3:53 pmDEN-MDW
2h 25mnonstop
$98Frontier
Find Deal
Wed, Oct 22 - Mon, Oct 27
Frontier Logo
7:15 am - 9:04 amORD-DEN
2h 49mnonstop
Frontier Logo
6:00 am - 9:36 amDEN-ORD
2h 36mnonstop
$99Frontier
Find Deal
Mon, Oct 20 - Fri, Oct 24
Frontier Logo
6:24 pm - 8:08 pmMDW-DEN
2h 44mnonstop
Frontier Logo
7:49 am - 11:16 amDEN-MDW
2h 27mnonstop
$99Frontier
Find Deal
Sun, Sep 7 - Fri, Sep 12
Frontier Logo
6:00 am - 7:45 amORD-DEN
2h 45mnonstop
Frontier Logo
6:00 am - 9:37 amDEN-ORD
2h 37mnonstop
$100Frontier
Find Deal
Thu, Oct 30 - Mon, Nov 3
Frontier Logo
12:30 pm - 2:16 pmMDW-DEN
2h 46mnonstop
Frontier Logo
8:05 am - 11:30 amDEN-MDW
2h 25mnonstop
$100Frontier
Find Deal
Thu, Sep 18 - Mon, Sep 22
Frontier Logo
6:00 am - 7:45 amORD-DEN
2h 45mnonstop
Frontier Logo
6:00 am - 9:37 amDEN-ORD
2h 37mnonstop
$101Frontier
Find Deal
Thu, Sep 11 - Thu, Sep 18
Frontier Logo
6:00 am - 7:45 amORD-DEN
2h 45mnonstop
Frontier Logo
8:30 pm - 11:59 pmDEN-ORD
2h 29mnonstop
$102Frontier
Find Deal
Tue, Oct 7 - Sat, Oct 11
Southwest Logo
8:00 am - 9:45 amMDW-DEN
2h 45mnonstop
Southwest Logo
7:15 pm - 10:35 pmDEN-MDW
2h 20mnonstop
$147Southwest
Find Deal
Sat, Oct 11 - Sat, Oct 18
Southwest Logo
5:15 pm - 6:55 pmMDW-DEN
2h 40mnonstop
Southwest Logo
8:15 am - 11:40 amDEN-MDW
2h 25mnonstop
$151Southwest
Find Deal
Expert advice

Expert advice for your flight from Chicago to Denver

 
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.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Frontier

Frontier's Economy Bundle includes a carry-on and seat choice, offering budget-friendly travel.


Choose Premium Bundle for extra legroom and priority boarding, enhancing comfort.

Read more about Frontierby Stefanie Waldek
Southwest

Enjoy two free checked bags up to 50 pounds each, ideal for family travel.


Use EarlyBird Check-In for a better boarding position, avoiding middle seats.

Read more about Southwestby Blane Bachelor
United Airlines

United's Economy Plus offers up to six inches more legroom, enhancing comfort.


Access Wi-Fi on most flights; T-Mobile customers enjoy free streaming.

Airports
ORD

ORD is Chicago's main airport, offering numerous flights and amenities, but expect longer security lines during peak times.

Read more about ORDby Stefanie Waldek
MDW

MDW offers a user-friendly experience with shorter security lines and easy navigation, ideal for domestic travelers.

Read more about MDWby Stefanie Waldek
DEN

From DEN, take the RTD A line train to downtown Denver in about 40 minutes for an affordable and convenient option.

Read more about DENby Harriet Baskas
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier, United Airlines, ORD and MDW

Stefanie Waldek

Stefanie Waldek

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.

Read more
Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor

Blane Bachelor

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.

Read more
Harriet Baskas

Harriet Baskas

Expert on DEN

Harriet Baskas

Harriet Baskas

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.

Read more
Booking Insights

KAYAK's insights & trends for Chicago to Denver flights

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

Find cheap flights to Denver
Find cheap flights to Denver

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.

What is the cheapest Chicago to Denver flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The absolute cheapest return flight from Chicago to Denver costs $89 on the route between Chicago O'Hare Intl Airport (ORD) and Denver (DEN). However, over the past month, flights between Chicago Midway Airport (MDW) and Denver (DEN) were, on average, 12% cheaper than other Chicago-Denver routes. The most popular route is between Chicago O'Hare Intl Airport (ORD) and Denver (DEN).

What’s the cheapest day of the week to fly from Chicago to Denver?

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

When flying from Chicago to Denver, you should consider leaving on a Saturday and avoid Sundays if you are looking for the best rates. For your return to Chicago, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

What is the cheapest month to fly from Chicago to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago 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 to Denver is November, where tickets cost $157 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $231 and $218 respectively.

How far in advance should I book a flight from Chicago 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 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 to Denver, you should book around 3 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

 AI-powered savings tips

KAYAK's tips to save more on a Chicago to Denver flight

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. 

Good to know

Low seasonApril
Cheapest flight$66
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 3% increase in price.
Flight from Chicago O'Hare Airport to Denver

When to book flights from Chicago to Denver

Are your dates flexible? Find out the best times to travel from Chicago 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 flights from Chicago to Denver

  • What is the fastest way to get from downtown Chicago to Chicago Midway International Airport (MDW)?

    By far the fastest way to Chicago Midway International Airport (MDW) is on the Chicago L Trains. The Orange Line train runs from downtown to Chicago Midway Airport (MDW) in about 20–25 minutes. Riders may purchase either a single ride, 1-day or 3-day ticket for the trip, depending on their needs.

  • Where can I get an Uber at Denver International Airport (DEN)?

    Once travelers have collected their luggage they should request their ride from Uber. Standard sized Ubers can be met on Level 5 Island 5, while Uber Black and SUVs should be met on Level 5, Island 2. Please take note if you are on the east or west side of the airport when requesting your Uber.

  • Are there pet relief areas at Chicago Midway International Airport?

    Chicago Midway International Airport (MDW) has two pet relief areas. One is indoors and located next to gate A5, with synthetic grass and a sitting area, while the outdoor facility, which is a fenced area that includes bags for dog waste and benches, is located at the south end of the lower level.

  • Does Denver International Airport (DEN) offer a cell phone lot for those picking up passengers?

    The free cell phone lot, quaintly named the Final Approach, is located about three miles from the airport on Pena Blvd. Those meeting passengers should wait here for travelers to arrive on their flights and collect their bags since there is no waiting or parking is allowed curbside at the terminal buildings.

  • Is there public transportation from Denver International Airport (DEN) to downtown Denver?

    The distance between downtown Denver and Denver International Airport (DEN) is about 23 miles. The easiest and most convenient way of getting there is via The A-Line commuter train in a travel time of 37min. The train station is located at the Transit Center, on the ground level side of Westin.

  • How do I get to the Denver Museum of Nature & Science from Denver International Airport (DEN)?

    Denver Museum of Nature & Science lies about 16 miles from Denver International Airport (DEN). There are several transportation options connecting the two destinations. If you’re traveling on a budget, then line 40 bus is a perfect choice as it helps you save a few dollars, and you’ll be there in about 50min. However, if you value convenience and privacy, take a taxi and be there in about 27min.

  • Are there car rentals from Denver International Airport (DEN) to the city center of Denver?

    You can find several car rental companies at Denver International Airport (DEN), most of them located about a 5min drive from the airport. From the baggage claim area, continue out the double-door exits on either side of the terminal, and look out for a shuttle that will connect you to this point.

  • Are there any services for passengers with disabilities at the Denver International Airport (DEN) upon their arrival?

    Denver International Airport (DEN) offers services to passengers with disabilities and limited mobility. However, it’s critical to pre-book the services with your airline. Besides the wheelchair-accessible terminals and counters, there is an elevator to aid your passage from one floor to another.  

  • What is the cheapest flight from Chicago to Denver?

    In the last 3 days, the lowest price for a flight from Chicago to Denver was $66 for a one-way ticket and $98 for a round-trip.

  • Do I need a passport to fly between Chicago and Denver?

    No

  • Which airports will I be using when flying from Chicago to Denver?

    There are 3 airports in Chicago (Chicago Midway, Chicago O'Hare Intl, and Chicago Greater Rockford.) and only 1 airport in Denver (Denver Intl). The cheapest flights are generally found on the Chicago O'Hare Airport to Denver Intl flight route.

  • Which airlines offer Wi-Fi service onboard planes from Chicago to Denver?

    American Airlines, and Alaska Airlines offer inflight Wi-Fi service on the Chicago to Denver flight route.

  • Which aircraft models fly most regularly from Chicago to Denver?

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

  • Which airline alliances offer flights from Chicago to Denver?

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

  • On which days can I fly direct from Chicago to Denver?

    There are nonstop flights from Chicago to Denver on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from Chicago to Denver are Southwest and United Airlines. With an average price for the route of $226 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $285 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Chicago 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 to Denver.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Chicago 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 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 with another airline.

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $121 or less one-way and $154 or less round-trip.
  • Travelers on flights from Chicago to Denver looking for an authentic Mexican sandwich should stop by Tortas Frontera by Rick Bayless. The torta is the signature dish at this quaint restaurant located at Termninal 5 Concourse M, Terminal 1 Concourse B, and Terminal 3 Concourse K of Chicago O’Hare International Airport (ORD). In addition to great tortas, Tortas by Rick Bayless also features a guacamole bar, fresh tortilla chips and salsa, plus a full line of salads and craft beers.
  • There are several charming hotels near Denver International Airport (DEN) ideal for those who will be arriving late. Plan to book a comfortable room at the Staybridge Suites Denver International Airport or Residence Inn by Marriott Denver Airport/Convention Center for a relaxing night before connecting to your destination the next day.
  • When looking to arrive in comfort and style in Denver, your first choice should be Peak 1 Express. Peak 1 offers affordable and safe transportation in their full line of Mercedes Benz Sprinters. Whether you are headed to downtown Denver or one of Denver’s many ski resorts, Peak 1 can get you there in style and in comfort.
  • When looking for a hotel that is both upscale and convenient, the The Westin Denver International Airport (DEN) is the perfect spot. This hotel's intriguing design is changing the way travelers think about airport hotels. With convenient access to both downtown Denver and the wealth of ski resorts the Colorado mountains offer, this property has something for everyone.
  • If you’re departing from Chicago Midway International Airport (MDW), keep in mind that the airport has a road system running between the terminal and the secure area. A pedestrian bridge connects the two buildings, and passengers must first pass through the terminal building to clear security before entering the concourse areas. Once inside the secure area, you’ll arrive at the central market, which features a large seating area, shops and restaurants.
  • Chicago O’Hare International Airport (ORD) has mother’s rooms in each terminal. The facilities offer comfortable rooms for traveling mothers to care for young children, nurse and use a breast pump. If you’re using Terminal 2, you’ll find this amenity at Concourse F, Crossover Between Gates E5 and F9. At Terminal 3, it’s at the Rotunda, next to the Yoga Room.
  • When the kids are along for the trip from Chicago to Denver, take them to the Family Lounge, located in Terminal 2 past security checkpoint Chicago O’Hare International Airport (ORD). Vibrant seating arrangements are accompanied by convenient device charging stations, while travelers with infants will find designated stroller parking available. Throughout the year, particularly during festive seasons like the holidays, live entertainment graces the lounge with performances from musicians, caricature artists, and more.
  • Check with your airline if you can bring pets on board. For instance, Frontier Airlines allows passengers to bring cats and dogs in the cabin. However, the pets must have the necessary documentation, including the anti-rabies vaccine certificate. Still, you must restrict them in their cages to avoid disturbing other passengers.
  • Travelers on flights from Chicago to Denver looking for a spacious and luxurious place to spend some time before their flight can head to the United Club located in Terminal 1, Concourse B of Chicago O’Hare International Airport (ORD). This clean and quiet lounge is the perfect spot to work or relax before your flight. They offer a full buffet, a wide array of beverages and snacks and plenty of tables and power outlets to get any last-minute work done before your flight.
  • If you’ll be flying United Airlines from Chicago to Denver International Airport (DEN), you’ll be glad to know that the carrier has a hub at Chicago O’Hare International Airport (ORD). Passengers flying with this airline use Terminal 1 at ORD. There’s a shuttle bus connecting the Parking Lot F to this terminal, and travelers get fast-lane service when checking in.

Prefer to fly direct from Chicago to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Chicago to Denver Intl.
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

American Airlines, Frontier, Southwest, +2 more

American Airlines, Frontier, +3 more

Tuesday

American Airlines, Frontier, Southwest, +2 more

American Airlines, Frontier, +3 more

Wednesday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Thursday

American Airlines, Frontier, Southwest, +2 more

American Airlines, Frontier, +3 more

Friday

American Airlines, Frontier, Southwest, +2 more

American Airlines, Frontier, +3 more

Saturday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Sunday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

See more direct flights

Direct returns

Denver Intl to Chicago

Monday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Tuesday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Wednesday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Thursday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Friday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Saturday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

Sunday

American Airlines, Frontier, Southwest, +1 more

American Airlines, Frontier, +2 more

See more direct flights

Reviews of the top 4 airlines serving from Chicago 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 Chicago 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.
8.0
SouthwestOverall score based on 4242 reviews
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

6.0 GoodDavid, Aug 2025MCO - DEN
Read more Southwest reviews

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

We sat on the plane on the tarmac for 4 hours.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

WiFi on the flight was not working. Thus, entertainment options were limited.

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 understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

After a two hour delay, my flight was CANCELLED! No pilot available. Such BS.

Amazing food, great staff, with one noticable detail missing ...but no seat entertainment in any of aircraft ...I am not a fan

I wish American Airlines would change the airline industry by loading the plane back to front instead of front to back. Planes would board so much more smoothly and quickly.

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

One of the best flights I’ve had. So smooth.

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

Frontier Airlines was AWFUL. I was an hour early for my flight and the lady refused to check me in. I had to purchase a whole new ticket with a different airline.

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

First of all, we never got on the connecting flight to Denver. They delayed our flight for two hours. If we would have gotten on that flight, we would have been stuck in Denver for 13 hours. So we re- routed our flight for a straight through flight to Oklahoma two days later. THEN, they delayed that flight for two hours. After that we were able to finally get on our flight and come home. Frontier Airlines - one of the worst airlines I have ever been on.

Terrible communication with weather delay, lost baggage, near impossible to reach customer service

My tickets got canceled on me by your site and I didn't have a flight. Then you kept sending me emails on the status of q flight I didn't have tickets for.

Flight was late. Missed connecting in Denver. My new flight is more than 24 hours later and I have no room, vouchers, or compensation, and might also be bumped from the one tomorrow.

This was one of the first frontier airline flights this spring that wasn't delayed. It actually left on time. Some of the flight crew did not look happy, they didn't smile when the passengers were boarding or getting off the plane, and the passengers initiated greetings, not the staff. To me this was an odd experience to have with any flight/airline. I had a bad experience booking this flight. The price didn't solidify until late hours into the night. Ever time I purchased the ticket, I either received a denial email or an error because the price has changed, but it was never reflected on the flyfrontier or kayak websites until way after midnight on the date of travel. This caused me anxiety and irritation with the websites. Then I noticed a mishap with my name on my voucher as I went to check in, it was incorrect. When I proceeded to correct it, Frontier had no easy, let alone free, way to remedy it. I couldn't correct my name without a $75 charge, I couldn't cancel my voucher to repurchase it with the correct name without a $100 charge, because it was too close to departure. Then calling frontier was nearly impossible to remedy the situation with a human. It's already difficult to want to choose frontier because of all the upcharges, but you feel kinda trapped into doing so because it's the more affordable airline.

Our flight was cancelled. They could do nothing to help us get another flight that was timely. Because the first leg was cancelled we were unable to get to our connection. We had to book on an entirely different airline for today. So we spent more money, lost a day of vacation and will never fly Frontier again, so the 'we are sorry, here is $100 credit' is a joke since we won't be flying on Frontier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

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Compare transportation modes for Chicago to Denver

Transportation modeAverage priceAverage duration
Flights$3092h 38m
Trains$35118h 56m
Buses$21226h 22m

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