Frontier's UpFront Plus guarantees an empty middle seat for extra comfort.
Early check-in helps secure your place due to frequent overbooking.
Most accurate provider | FlightHub 3 stars |
---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $116 (Cheapflightsfares) |
One-way from | $69 (Cheapflightsfares) |
Popular in | March |
Cheapest in | April |
Average price | $307 |
Good round-trip deal | $230 or less |
Good one-way deal | $128 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 5/10
8:15 pm-9:48 pm
Nonstop2h 33m
Denver Intl
Wed 5/14
6:50 am-9:59 am
Nonstop2h 09m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 4/26
6:00 am-10:09 am
1 stop5h 09m
Denver Intl
Fri 5/2
12:55 am-9:47 am
1 stop7h 52m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 4/29
7:19 am-1:28 pm
1 stop7h 09m
Denver Intl
Sat 5/3
12:13 pm-7:29 pm
1 stop6h 16m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 4/29
5:20 am-8:50 am
1 stop4h 30m
Denver Intl
Wed 4/30
8:35 am-11:35 am
Nonstop2h 00m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Thu 4/17
1:43 pm-3:13 pm
Nonstop2h 30m
Denver Intl
Sat 4/26
6:44 pm-9:50 pm
Nonstop2h 06m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Fri 6/20
2:27 pm-9:04 am
1 stop19h 37m
Denver Intl
Thu 6/26
10:15 am-11:36 am
1 stop24h 21m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 4/22
6:30 am-11:21 am
2 stops29h 51m
Denver Intl
Fri 4/25
6:37 pm-11:59 pm
2 stops28h 22m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 4/26
6:58 pm-8:29 pm
Nonstop2h 31m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Sat 4/26
6:00 am-10:09 am
1 stop5h 09m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Mon 4/28
10:17 am-4:44 pm
1 stop7h 27m
Provider | Price Accuracy | Trust Score* |
---|---|---|
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*3 stars | |
Price Accuracy- | Trust Score*3 stars | |
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy1 star | Trust Score*3 stars | |
Price Accuracy3 stars | Trust Score*2 stars |
Booking 46 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, October is the cheapest month in which you can book a flight from St. Louis to Denver (average of $197). Flying from St. Louis to Denver in March is currently the most expensive (average of $278). 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 optimal to fly from St. Louis to Denver in the evening. By choosing this option you can save up to 69% on the cost of your flight, compared to a flight in the morning.
Travelers seeking maximum savings on their St. Louis to Denver flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.
If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).
Crew
Boarding
Overall
Food
Comfort
Entertainment
Reviews
Steven,Feb 2025
BZN - DEN
Crew
Boarding
Overall
Food
Comfort
Entertainment
Reviews
Steven,Feb 2025
BZN - DEN
Crew
Boarding
Overall
Food
Comfort
Entertainment
Reviews
Steven,Feb 2025
BZN - DEN
Crew
Boarding
Overall
Food
Comfort
Entertainment
Reviews
Steven,Feb 2025
BZN - DEN
Crew
Boarding
Overall
Food
Comfort
Entertainment
Reviews
Steven,Feb 2025
BZN - DEN
Crew
Boarding
Overall
Food
Comfort
Entertainment
Reviews
Steven,Feb 2025
BZN - DEN
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Cheapest$45 | Average$113 | FlexibilityNo cancel fee | On-time62% | |
Cheapest$128 | Average$246 | FlexibilityNo cancel fee | On-timeN/A | |
Cheapest$151 | Average$313 | FlexibilityNo cancel fee | On-time69% | |
Cheapest$178 | Average$301 | FlexibilityNo cancel fee | On-time63% | |
Cheapest$192 | Average$258 | FlexibilityNo cancel fee | On-time71% |