MCI - DEN

$91 Find Cheap Flights from Kansas City to Denver - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Kansas City to Denver departing on 6/29. 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 Kansas City 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 Kansas City to Denver, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$122
Typical prices: $244-$117
Frontier
Wed 9/2Tue 9/8
MCI - DEN • Non-stop
Cheapest non-stop
$123
Typical prices: $319-$174
Frontier
Tue 7/14Tue 7/28
MCI - DEN • Non-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 for budget value.
United Economy Plus adds legroom, while Southwest includes a free carry-on.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Frontier, Southwest and United Airlines. Average duration is 1h 54m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 20% price drop
Most popular
Good to know
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+1
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We hope you love your trip to Denver!
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Flight Deals

Cheap Flights from Kansas City to Denver (MCI-DEN)

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

Wed, Sep 2 - Tue, Sep 8
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:11 am - 1:00 pm
DEN
-
MCI
1h 49mnonstop
$122Frontier
Tue, Jul 14 - Tue, Jul 28
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:16 am - 1:00 pm
DEN
-
MCI
1h 44mnonstop
$123Frontier
Tue, Jul 7 - Tue, Jul 14
Frontier Logo
4:58 pm - 6:03 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:16 am - 1:00 pm
DEN
-
MCI
1h 44mnonstop
$125Frontier
Tue, Jun 23 - Tue, Jun 30
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:11 am - 1:00 pm
DEN
-
MCI
1h 49mnonstop
$126Frontier
Thu, Aug 6 - Sat, Aug 8
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:16 am - 1:00 pm
DEN
-
MCI
1h 44mnonstop
$127Frontier
Mon, Aug 10 - Mon, Aug 17
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:16 am - 1:00 pm
DEN
-
MCI
1h 44mnonstop
$129Frontier
Mon, Oct 5 - Mon, Oct 12
Frontier Logo
2:17 pm - 3:22 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:38 am - 1:22 pm
DEN
-
MCI
1h 44mnonstop
$130Frontier
Wed, Jun 24 - Mon, Jun 29
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:11 am - 1:00 pm
DEN
-
MCI
1h 49mnonstop
$132Frontier
Tue, Jul 7 - Tue, Jul 14
Frontier Logo
4:58 pm - 6:03 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:16 am - 1:00 pm
DEN
-
MCI
1h 44mnonstop
$133Frontier
Tue, Jul 14 - Wed, Jul 15
Frontier Logo
1:45 pm - 2:50 pm
MCI
-
DEN
2h 05mnonstop
Frontier Logo
10:16 am - 1:00 pm
DEN
-
MCI
1h 44mnonstop
$134Frontier
Booking Insights

KAYAK's insights & trends for Kansas City to Denver flights

Get data-powered insights and trends into flights from Kansas City 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 Kansas City 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 Kansas City to Denver departing in September.

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

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

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

What is the cheapest month to fly from Kansas City to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Kansas City 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 Kansas City to Denver is September, where tickets cost $166 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $250 and $244 respectively.

How far in advance should I book a flight from Kansas City 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 Kansas City 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 Kansas City to Denver, you should book around 3 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from Kansas City 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 Frontier and United Airlines

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.

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.

John Walton

John Walton

Expert on MCI

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Harriet Baskas

Harriet Baskas

Expert on 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.

Good to know

Low seasonJanuary
Cheapest flight$91
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Kansas City to Denver

When to book flights from Kansas City to Denver

Are your dates flexible? Find out the best times to travel from Kansas City 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 Kansas City to Denver

  • Does the Denver airport have airport hotels?

    The Westin Denver International Airport hotel is located only a few steps from the main terminal. The hotel features 519 rooms and a conference center. Otherwise, there are numerous hotels within 10 miles of Denver International Airport that you can book if you want to stay relatively close to the airport.

  • Are there nonstop flights from Kansas City to Denver, Colorado?

    Different airlines serve flights from Kansas City to Denver, including American Airlines and United Airlines. You can find nonstop flights via United Airlines. Otherwise, you will need to book a flight with one-stop. Most one-stop flights have their layover at Dallas Fort Worth International Airport (DFW) or Chicago O'Hare International Airport (ORD).

  • Does Denver International Airport offer accessible services for people with disabilities?

    The airport offers numerous services for travelers with disabilities. There are transportation companies to pick up travelers with special needs from the curbside outside the Jeppesen Terminal on Level 5—prior notice required. At the ticket counter, you can request a wheelchair or electric cart through your airline. All ground transportation companies have wheelchair-accessible vehicles.

  • Can I travel with my pet through Denver International Airport?

    Yes, traveling with your pet through Denver International Airport is convenient, and the airport offers animal relief areas on the concourses. These areas give your pet a welcoming space, allowing them to relax before or after a flight. You can find the pet relief rooms near gates A, B, and C.

  • What is the cheapest flight from Kansas City to Denver?

    In the last 5 days, the lowest price for a flight from Kansas City to Denver was $91 for a one-way ticket and $122 for a round-trip.

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

    No, a passport isn't needed to fly from Kansas City to Denver. However, local authorities might ask for an official ID.

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

    Delta, American Airlines, JetBlue, and Alaska Airlines offer inflight Wi-Fi service on the Kansas City to Denver flight route.

  • Which aircraft models fly most regularly from Kansas City to Denver?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Kansas City to Denver flight route.

  • Which airline alliances offer flights from Kansas City to Denver?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Kansas City to Denver are Southwest and United Airlines. With an average price for the route of $265 and an overall rating of 7.9, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $273 and an overall rating of 7.4.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Kansas City 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 Kansas City 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 Kansas City with another airline. Booking your flights between Kansas City 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 Kansas City 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 Kansas City 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 Kansas City to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $179 or less one-way and $269 or less round-trip.
  • Kansas City International Airport (MCI) is the preferred departure point for travelers going to Denver. People going to the airport from downtown Kansas City will find there are convenient ways to travel to the airport, and multiple airlines operate at the airport.
  • If you need curbside assistance at any terminal in Kansas City International Airport, call your airline or notify the Airport Traffic Control Officer; you can only use curbs for immediate loading or unloading.
  • At Terminals B and C, you’ll find animal relief areas for pets. If you’re flying with Frontier Airlines, American Airlines, Spirit Airlines, or Alaska Airlines, you’ll be able to access the animal relief area.
  • For all your connectivity needs, the Kansas City International Airport offers free Wi-Fi. The Wi-Fi zone may be limited in ranges and its geographical footprint, so check for logos like “Wi-Fi Certified,” “Wi-Fi Zone,” or “Wi-Fi Protected Access.”
  • Flights from Kansas City arrive at Denver International Airport (DEN), located strategically to serve metropolitan Denver and neighboring areas, including the extensive Front Range Urban Corridor.
  • If you’re exhausted when you arrive at the Denver airport and you need to relax, there are spas and lounges available within the B gates, A gates, and C gates. There, you can get a massage and enjoy extra space to recharge.
  • Dining options at the Denver airport include restaurants with take-out options. You can find these restaurants at the C gates next to Gate C26, at the B gates, at the A gates in the central area, and near Gate A71.
  • Travel options from Denver International Airport include the A Line commuter train, which takes approx. 37min to get to downtown Denver. Also, you can take hotel shuttles to nearby hotels. Taxis are available from the airport, or if you want something a little cheaper, you can request an Uber on your smartphone.

Prefer to fly direct from Kansas City to Denver?

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

Direct departures

Kansas City to Denver Intl

Monday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct flights

Direct returns

Denver Intl to Kansas City

Monday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Tuesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Wednesday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Thursday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Friday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Saturday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

Sunday

Frontier,Southwest,United Airlines

Frontier,Southwest, +1 more

See more direct flights

Reviews of the top 4 airlines serving from Kansas City to Denver

 
See real verified KAYAK customer reviews for airlines flying from Kansas City 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 Kansas City 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 4237 reviews
7.5Entertainment
7.0Food
8.0Comfort
8.1Boarding
8.6Crew
Airline reviews

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

10.0 ExcellentAnonymous, Jun 2026
OKC - LAS
Read more Southwest reviews

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

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.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

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.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

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!

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.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight back to Dallas was delayed, which has happened to me several times with American Airlines. There was no announcement, no update sent out, no compensation offered for the inconvenience.

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

Our flight from JFK to Madrid was delayed. We had to go from one side of the Madrid airport (Terminal 4s to the far end of terminal 4 - Gate K98) to our gate in less than 30 minutes. Put passport control and security/baggage check and that’s very hard unless you’re Usain Bolt. I called Iberia Airlines and the telephone customer service told me that I was going to have to pay to re-book. Luckily the help desk in the airport (who was dealing with dozens of people from the same JFK-Madrid flight) did not charge us extra to reschedule to a flight 8 hours later. They also gave us a voucher for breakfast and lunch. Glad the actual person at the airport had some actual sense.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

Boarding was smooth and seamless and the flight was without incident.

Our flight was repeatedly delayed for maintenance problems: scheduled for 9.30am, eventually delayed to 7pm! Very very inconvenient! AA should have provided a substitute plane much earlier.. On the other hand, Customer Service crew in Charlotte helped us to reach NY (LGA) by late afternoon. Thank you Patricia!! The actual flight was quick and very comfortable. As always a. excellent, professional crew. [no food on a a short hop).

Take-off delayed an hour because of a missing flight officer, so,arrived in Charlotte lates causing many passengers to miss connections. Otherwise a very good flight, safe and comfortable, with an excellent professional crew.

Little time between flight from Dallas to flight to Gainesville. We chose this one, 43 minutes between, because the price for a connection with at least an hour between, was so much higher. Had to ask passengers on the Dallas flight to please allow us to deplane ahead of them. The economy passengers allowed this. We had to walk very fast to the next gate, 35 gates away. Thankfully all in the same terminal. Getting to the small Gainesville plane was a little confusing as you enter an area that is boarding many small planes at the same time. We stood in the wrong line for about 15 seconds before realizing it was not our Gainesville flight. Since I had boarded at this gate in the past, I knew to check the signs carefully so we weren’t lost. The first class seat experience was wonderful. I really enjoyed the upgrade. We were offered an alcohol drink as soon as we sat down. I got something different but it was a great gesture especially since we really had to hurry to make the flight. We had packed expecting we might miss this connection, but made it. Our luggage didn’t miss the flight. American Airlines delivered our bags to our home the next day. That was very convenient!

The plane was large, not full, but one with 3 seats near each window and 4 in a row in the middle of the plane. There were screens on the backs of the seats for entertainment and information. To use the entertainment one needs ear plugs that physically plug into the screen. My husband had some he let me use as I only had blue tooth type. The stewards gave out some headphones to some, but when my neighbor asked for some, the steward said no. So maybe they ran out? Idk. Bring the old kind of headphones or earbuds if you want entertainment in case this is the type of entertainment offered. We had a very tight connection in Miami. 43 minutes. The other economy passengers allowed us to get ahead of them because I asked if we could since we were near boarding time for our next flight and 35 gates away. They were extremely kind. First class wasn’t going to allow us to pass through. We did make the next flight. Our baggage didn’t, but they were delivered to us the next day and we were prepared with essentials in our carry on packs.

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.

The staff at the check in counter was so rude. Made you feel Incompetent

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.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

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!!!

Everything you need to know for your flight from Kansas City to Denver

Other airlines flying from Kansas City to Denver

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