Cheap flights from St. Louis to Denver (STL - DEN)

STL — DEN
May 30 — Jun 61

The best prices from Lambert-St Louis to Denver Intl are usually found in September or October, booked 60 days in advance, depart on a Tuesday or Friday and return on a Wednesday

How to find the cheapest flight from St. Louis to Denver

All the information you need to plan the best STL to DEN flight in 2022: compare St. Louis to Denver flight prices with the expected peak season, weather and rainfall in Denver.

STL - DEN

Price

$127 - $218

DEN

Temperature

30.2 - 73.4 °F

DEN

Rainfall

0.5 - 2.3 inches

Popular inDecemberHigh demand for flights, 26% potential price rise
Cheapest inSeptemberBest time to find cheap flights, 21% potential price drop
Average price$159Average for round-trip flights in May 2022
Round-trip from$127From Lambert-St Louis to Denver Intl

What is the cheapest day to fly round-trip from St. Louis to Denver?

Saturday flights are generally found to be more expensive for flights from St. Louis to Denver. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Denver.

How far in advance should I book a flight from St. Louis to Denver?

Find a great deal and save up to 14% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Denver within the next two weeks, with the cheapest ticket starting at $142.

What is the cheapest month to fly from St. Louis to Denver?

September can be a great time to fly to Denver from St. Louis with a flight ticket averaging about $160. Cheapflights users have found deals in the month of September for as cheap as $82. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from St. Louis to Denver (STL - DEN)?

It’s optimal to fly from St. Louis to Denver in the evening. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight at noon.

Cheap flights from St. Louis to Denver in May, June 2022

The best prices found for STL to DEN flights for May, June
May 29 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$170

Frontier

View Deal

Deal found 22/5/22

Jun 3 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$180

Frontier

View Deal

Deal found 22/5/22

Jun 2 - Jun 6
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$185

Frontier

View Deal

Deal found 24/5/22

St. Louis to Denver 2022 flight deals

Cheap flights to Denver from St. Louis found for this year
May 29 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$170

Frontier

View Deal

Deal found 22/5/22

Jun 3 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$180

Frontier

View Deal

Deal found 22/5/22

Jun 2 - Jun 6
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$185

Frontier

View Deal

Deal found 24/5/22

Cheap Frontier flights from St. Louis to Denver

Jun 3 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$180

Frontier

View Deal

Deal found 22/5/22

Jun 2 - Jun 6
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$185

Frontier

View Deal

Deal found 24/5/22

Nov 15 - Nov 30
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 28m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 10m
$200

Frontier

View Deal

Deal found 22/5/22

Non-stop flights to Denver from St. Louis

Save time with St. Louis to Denver direct flight deals
Jun 4 - Jun 5
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$180

Frontier

View Deal

Deal found 24/5/22

Nov 15 - Nov 30
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 28m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 10m
$200

Frontier

View Deal

Deal found 22/5/22

Sep 22 - Sep 27
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 28m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 09m
$201

Frontier

View Deal

Deal found 25/5/22

Last minute flights from St. Louis to Denver

Late deals on return flights to Denver from St. Louis, departing today and this week
Jun 3 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$180

Frontier

View Deal

Deal found 22/5/22

Jun 2 - Jun 6
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$185

Frontier

View Deal

Deal found 24/5/22

Jun 3 - Jun 7
STL

Lambert-St Louis

DEN

Denver Intl

1 stop

8h 22m
DEN

Denver Intl

STL

Lambert-St Louis

Nonstop

2h 05m
$211

Multiple Airlines

View Deal

Deal found 23/5/22

One-way flights to Denver Intl from St. Louis

The cheapest one-way flights from St. Louis to Denver
Jun 15
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 25m
$87

Frontier

View Deal

Deal found 23/5/22

Jun 3
STL

Lambert-St Louis

DEN

Denver Intl

Nonstop

2h 22m
$91

Frontier

View Deal

Deal found 24/5/22

Jun 14
STL

Lambert-St Louis

DEN

Denver Intl

1 stop

12h 41m
$114

Multiple Airlines

View Deal

Deal found 23/5/22

Related info for your journey

Useful info, stats and facts about St. Louis to Denver flights.

What airports do I use to fly from St. Louis to Denver?

You will need to book a flight from Lambert-St Louis to Denver Intl if you want to fly from St. Louis to Denver. At least 9 different airlines have flights from Lambert-St Louis (STL) to Denver Intl (DEN) on a regular basis. There are 15 flights to Denver from the St. Louis airport per day. If you manage to book one that is nonstop, then you can expect the flight time from STL to DEN to be around 2h 17m.

Which airlines flying from Lambert-St Louis to Denver Intl have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Lambert-St Louis to Denver Intl that may be offering flexible cancellation policies are Frontier, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from St. Louis to Denver for under $200 on Cheapflights?

Yes, there are multiple flights from St. Louis to Denver for under $200. The cheapest flight booked recently is on Frontier for just $180, but on average you can expect to pay $222.

Are there nonstop flights from St. Louis to Denver for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from St. Louis to Denver under $200. A good price for a nonstop flight from St. Louis to Denver is less than $226.

Are there last-minute flights available from St. Louis to Denver for under $200?

There are currently 20+ open flights from St. Louis to Denver within the next 7 days for less than $200.

What days are nonstop flights available from St. Louis to Denver?

Days when nonstop flights are available for this flight are: Friday, Saturday.

How popular is this St. Louis to Denver flight route?

Flights from Lambert-St Louis to Denver Intl have been viewed 52 times in the past calendar month.

How many flights depart from St. Louis to Denver on average per day?

2 flight departures from St. Louis to Denver per day on average.
Afternoon (Noon - 6pm) - 100% of flight departures

How long is the flight from St. Louis to Denver?

Departing from St. Louis to Denver will take you 2h 22m. Airlines will cover a distance of 772 mi. Generally, flights for this route are nonstop.

What is the cheapest airline to fly from St. Louis to Denver round-trip?

Frontier, at $180, was found to be the cheapest airline from St. Louis to Denver..

What are the cheapest airlines to fly from St. Louis to Denver one-way?

One-way options have recently been found by users for as low as $87 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $131 and United Airlines from $133 one-way.

What are the most popular airlines that fly from St. Louis to Denver?

When booking a flight from St. Louis to Denver, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

What are the most reliable airlines from St. Louis to Denver?

No one likes to see their flight delayed. When booking a flight from St. Louis to Denver consider choosing SkyWest Airlines (93%), United Airlines (90%) or Air Canada (86%) as they are the most reliable in getting you off to your destination on time.

What are the cheapest flights from St. Louis to Denver?

Looking for the cheapest flight from St. Louis to Denver? While on average our users pay $535, our data indicates the cheapest price to be $56. The most popular route (Lambert-St Louis - Denver Intl), is priced around $230.

Alternative routes for St. Louis to Denver

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from St. Louis to Denver

The chart below displays the airlines Cheapflights users traveling from St. Louis to Denver choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$14Average$24FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
FrontierCheapest$59Average$152FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
American AirlinesCheapest$74Average$246FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
DeltaCheapest$91Average$232FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights

Hourly flight availability from St. Louis to Denver

See what time of day planes typically take off from St. Louis to Denver
6%of flight departuresEarly morningMidnight to 6 am
55%of flight departuresMorning6 am to noon
29%of flight departuresAfternoonNoon to 6 pm
10%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Denver

See how many times per day planes take to the skies headed from St. Louis to Denver
Sunday14daily flights
Monday18daily flights
Tuesday17daily flights
Wednesday17daily flights
Thursday16daily flights
Friday17daily flights
Saturday6daily flights