Frontier's UpFront Plus guarantees an empty middle seat for extra comfort.
Frontier offers Zone 1 boarding with a carry-on bag purchase or special fare bundle.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $69 (Frontier) |
One-way from | $40 (Frontier) |
Popular in | June |
Cheapest in | February |
Average price | $184 |
Fly from
Fly to
Route
Depart
Return
Price
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Sat 2/28
6:45 pm-7:45 pm
Nonstop2h 00m
Denver Intl
Wed 3/4
8:45 am-11:30 am
Nonstop1h 45m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Tue 1/6
1:42 pm-2:41 pm
Nonstop1h 59m
Denver Intl
Thu 1/8
9:50 am-12:37 pm
Nonstop1h 47m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Tue 3/3
3:25 pm-4:20 pm
Nonstop1h 55m
Denver Intl
Sat 3/7
8:50 pm-11:25 pm
Nonstop1h 35m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Mon 1/5
5:07 pm-6:18 pm
Nonstop2h 11m
Denver Intl
Wed 1/7
1:31 pm-4:08 pm
Nonstop1h 37m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Sun 2/8
6:15 am-10:31 am
1 stop5h 16m
Denver Intl
Sat 2/14
7:10 am-3:22 pm
1 stop7h 12m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Tue 2/3
4:09 pm-8:05 pm
1 stop4h 56m
Denver Intl
Mon 2/9
5:49 pm-11:27 pm
1 stop4h 38m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Tue 2/3
6:40 am-11:50 am
1 stop6h 10m
Denver Intl
Sat 2/7
1:10 pm-9:05 pm
2 stops6h 55m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Fri 1/9
6:15 am-10:31 am
1 stop5h 16m
Denver Intl
Mon 1/12
5:51 pm-11:27 pm
1 stop4h 36m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Sun 12/21
8:45 pm-9:49 pm
Nonstop2h 04m
Denver Intl
Thu 1/1
6:00 am-4:26 pm
1 stop9h 26m
Kansas CityDenver
MCI - DEN
MCIDEN
Kansas City
Sat 1/10
9:05 am-10:15 am
Nonstop2h 10m
Denver Intl
Sat 1/10
5:47 pm-8:33 pm
Nonstop1h 46m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The best time to book flights from Kansas City to Denver is 84 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, February is the cheapest month in which you can book a flight from Kansas City to Denver (average of $29). Flying from Kansas City to Denver in July is currently the most expensive (average of $107). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from Kansas City to Denver in the evening. Doing so could potentially save you 58% on the flight price compared to flying at noon, which is usually more expensive.
Travelers seeking maximum savings on their Kansas City to Denver flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Entertainment
Overall
Boarding
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Boarding
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Boarding
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Boarding
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Entertainment
Overall
Boarding
Comfort
Crew
Food
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$47 | Average$127 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$138 | Average$265 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$146 | Average$232 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$157 | Average$320 | FlexibilityNo cancel fee | On-time71% |