IND - DEN

$112 Find Cheap Flights from Indianapolis 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 Indianapolis to Denver departing on 8/31. 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 Indianapolis 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 Indianapolis to Denver, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$230
Typical prices: $367-$166
Frontier
Wed 10/14Wed 10/21
IND - DEN • 1 stop
Cheapest non-stop
$246
Typical prices: $309-$166
Frontier
Sat 7/18Tue 7/21
IND - 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 selection for better budget value.
United Economy Plus adds legroom, while Southwest Cash + Points boosts flexibility.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $220 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Frontier, Southwest and United Airlines. Average duration is 2h 45m
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 2 weeks in advance save around 16% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Indianapolis to Denver (IND-DEN)

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

Wed, Oct 14 - Wed, Oct 21
Frontier Logo
12:39 pm - 10:33 pm
IND
-
DEN
11h 54m
1 stop
Frontier Logo
11:48 pm - 11:44 am
DEN
-
IND
9h 56m
1 stop
$230Frontier
Wed, Jul 15 - Tue, Jul 21
Frontier Logo
12:20 pm - 10:05 pm
IND
-
DEN
11h 45m
1 stop
Frontier Logo
3:35 pm - 8:08 pm
DEN
-
IND
2h 33mnonstop
$239Frontier
Tue, Sep 8 - Tue, Sep 15
Frontier Logo
7:41 pm - 9:27 am
IND
-
DEN
15h 46m
1 stop
Frontier Logo
10:26 am - 10:14 am
DEN
-
IND
21h 48m
1 stop
$240Frontier
Sat, Aug 15 - Wed, Aug 19
Frontier Logo
7:47 pm - 7:33 am
IND
-
DEN
13h 46m
1 stop
Frontier Logo
10:09 am - 9:09 pm
DEN
-
IND
9h 00m
1 stop
$244Frontier
Sat, Jul 18 - Tue, Jul 21
Frontier Logo
8:53 pm - 9:48 pm
IND
-
DEN
2h 55mnonstop
Frontier Logo
3:35 pm - 8:08 pm
DEN
-
IND
2h 33mnonstop
$246Frontier
Tue, Jul 14 - Wed, Jul 22
Frontier Logo
8:53 pm - 9:48 pm
IND
-
DEN
2h 55mnonstop
Frontier Logo
3:35 pm - 8:08 pm
DEN
-
IND
2h 33mnonstop
$248Frontier
Wed, Jul 15 - Thu, Jul 23
Frontier Logo
12:20 pm - 10:05 pm
IND
-
DEN
11h 45m
1 stop
Frontier Logo
11:52 pm - 9:58 am
DEN
-
IND
8h 06m
1 stop
$249Frontier
Wed, Jul 8 - Fri, Jul 10
Frontier Logo
10:53 am - 7:33 am
IND
-
DEN
22h 40m
1 stop
Frontier Logo
10:09 am - 9:15 pm
DEN
-
IND
9h 06m
1 stop
$250Frontier
Sun, Jul 26 - Wed, Jul 29
Frontier Logo
7:47 pm - 11:00 pm
IND
-
DEN
29h 13m
1 stop
Frontier Logo
10:09 am - 9:15 pm
DEN
-
IND
9h 06m
1 stop
$251Frontier
Thu, Aug 20 - Sat, Aug 22
Frontier Logo
7:41 pm - 10:54 pm
IND
-
DEN
29h 13m
1 stop
Frontier Logo
3:24 pm - 8:01 pm
DEN
-
IND
2h 37mnonstop
$253Frontier
Booking Insights

KAYAK's insights & trends for Indianapolis to Denver flights

Get data-powered insights and trends into flights from Indianapolis 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 Indianapolis 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 Indianapolis to Denver departing in October.

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

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

If your flying dates are flexible, you should consider flying to Denver on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Indianapolis to Denver. For your return ticket, we recommend flying on a Friday and avoiding Mondays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Indianapolis 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 Indianapolis to Denver is August, where tickets cost $204 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $334 and $317 respectively.

How far in advance should I book a flight from Indianapolis 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 Indianapolis 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 Indianapolis to Denver, you should book around 2 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Expert advice

Expert advice for your flight from Indianapolis 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.

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.

Jennifer Simonson

Jennifer Simonson

Expert on IND

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Good to know

Low seasonJanuary
Cheapest flight$112
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Indianapolis to Denver

When to book flights from Indianapolis to Denver

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

  • Where can I sleep at Denver International Airport?

    You are welcome to book your stay at Westin Hotel at Denver International Airport if you’re looking for a place to sleep at DEN. The airport hotel is just a short distance from the main terminal, and you can access it by taking the escalator to level one at the Transit Canter. The establishment has 519 rooms, an onsite restaurant, and a conference center, making it ideal for business travelers.

  • What are the transport options from Denver International Airport?

    The first option is the Regional Transportation Department (RTD) trains. These RTD trains are available from the DEN airport station and depart every 15min. RTD also operates buses to downtown, which you’ll get at the bus stop next to the DEN airport station. You can also get charter buses to Denver and other cities around Colorado at the ground transportation area. Taxis are also available outside baggage claim, and although there are metered, they offer a flat rate to Boulder, downtown, and the Denver Tech Center. Car rentals are the self-drive option available, and you’ll find several companies, including Hertz, Avis, and National, with counters at DEN.

  • What accessible services are available at Indianapolis International Airport?

    IND is a barrier-free airport. Accessible parking is provided for passengers with limited mobility and accessible transport options for those taking public transport. G2 Secure Staff provides wheelchair assistance at IND, and you need to call ahead to schedule assistance. The restrooms at the airport terminal and parking garage are fully accessible. Hard-of-hearing passengers get visual paging on the flight information displays, and there are also TDD and TTY telephones around the airport for special needs passengers. Braille signage is available on doors, and elevator buttons and service animals are welcome to travel through the airport.

  • Are pets allowed to travel through Indianapolis International Airport?

    Yes. Pets in pet carriers are welcome to travel through IND. Pets can only leave their carriers when walking through security or using the pet relief areas. The airline has designated a grassy patch outside the terminal building as the outdoor relief area. Indoor pet relief areas are located in Room 04A.303. A, Concourse A and Room 03B.302. D, Concourse B.

  • What is the cheapest flight from Indianapolis to Denver?

    In the last 5 days, the lowest price for a flight from Indianapolis to Denver was $112 for a one-way ticket and $220 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

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

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

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

  • Which airline alliances offer flights from Indianapolis to Denver?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Indianapolis to Denver are Southwest and Delta. With an average price for the route of $357 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $356 and an overall rating of 7.9.

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

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

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $159 or less one-way and $292 or less round-trip.
  • Around 835 kg of carbon is emitted per passenger on flights from Indianapolis to Denver. You can fly more sustainably when you fly with United Airlines, Frontier Airlines, and Southwest Airlines. These airlines have flights that emit 66%, 66%, and 61% less carbon per passenger, respectively.
  • If you’re looking to unwind at a premium airline lounge at Denver International Airport (DEN), book a flight with American Airlines, United Airlines, or Delta. The first two have pay-at-the-door lounges at DEN, which you can access by paying the fee and showing your flight ticket. Delta runs a members-only lounge.
  • Stay fit at Indianapolis International Airport (IND) by taking a stroll or a power walk at the American Heart Association walking paths before your flight. There’s a quarter-mile walking path in the landside Ticketing Hall, and you’ll find half-mile walking paths in each concourse.
  • You can access banking services as soon as you land at DEN. Public Service Credit Union runs a full-service bank at DEN, which you’ll find in the Jeppesen Terminal, landside, on the sixth level. They also have several ATMs at the airport.
  • De-stress before your flight with a full body massage, facial, pedicure, or manicure at the EnRoute Spa at IND. The spa is open from morning to evening, and you’ll find the spa around Gates A14 and B6.

Prefer to fly direct from Indianapolis to Denver?

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

Direct departures

Indianapolis 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 Indianapolis

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 5 airlines serving from Indianapolis to Denver

 
See real verified KAYAK customer reviews for airlines flying from Indianapolis 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 Indianapolis 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 4255 reviews
7.5Entertainment
8.0Comfort
8.1Boarding
8.6Crew
7.0Food
Airline reviews

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!

2.0 MediocreDawn, Jun 2026
BUF - BWI
Read more Southwest reviews

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!

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Left /arrived on time. Decent seat space. Like the wifi/plugs and entertainment. Windows and tray table were kinda gross. Attendants didn't start snack service til 40mins before landing. Two rows before us, captain came on to say there's turbulence and recalled staff to seats. So, no drink/snack. Later, attendants didn't stop to see if we had trash nor even look our way. Felt invisible! Almost all pilot announcements were not only unintelligible, but so quiet. We had no idea what she said.

Average seat comfort, a drink and chips were provided, early boarding because we checked a carryon at the gate was nice. Ticket pricing shenanigans, including fees to pick a seat, check a bag, and get food onboard - evidence the industry is reinvigorating last century’s strategies- destroys the experience before one ever arrives at the airport. It’s difficult to recognize any value or sustain loyalty in the end-to-end process making air travel more drudgery than pleasure.

Gate agent was unhelpful for handicapped boarding. Flight attendant seemed untrained.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

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.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

The flight from LA to Chicago was smooth and service was very good overall.

The flight from Dallas to Tokyo was not on Japan Airlines. It was on American Airlines. Very disappointed that we did not fly on Japan Airlines. Will not be using you liars again. I’ll just book direct from the airline next time. Wish you could make this right and has us fly on Japan Air when heading back home to the US.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

They made nearly everyone check their bag because the overhead bins are way too small. Extremely inconvenient

Was put into a seat right behind the toilet that had no entertainment possible but did have plenty of leg room over noisy part of plane.

Movies on my phone are great. It would be nice to have a gluten free snack option.

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

The flight was peaceful, just s slight turbulence, pilots and crews were all nice and made a great job! Arrived safely in the Philippines. Thank you ya’ll!

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

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.

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 Indianapolis to Denver

Other airlines flying from Indianapolis to Denver

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