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

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The best prices from Denver to St Louis are usually found in October or September, booked 14 days in advance, depart on a Saturday or Wednesday and return on a Wednesday

How to find the cheapest flight from
Denver (DEN) to St Louis (STL)

DEN - STL
Price
$121 - $261
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches

Popular in

December

High demand for flights, 37% potential price rise

Cheapest in

October

Best time to find cheap flights, 26% potential price drop

Round-trip from

$121

From Denver to St Louis

One-way from

$49

One-way flight from Denver to St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Denver to St Louis?

Departing on a Friday is a good option for securing a great price. You can expect to save up to 40% when planning your travel around this day of the week.

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

Find a great deal and save up to 96% by booking at least 31 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 Denver to St Louis within the next two weeks, with the cheapest ticket starting at $374.

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

The best pricing can be found in the month of August. Prices to St Louis from Denver average $266. You can even find prices in August for less than $266, as users have found deals to St Louis from as low as $158. The month of December appears to be one of the more expensive times to travel to St Louis from Denver. Flying in the targeted month can save you up to 23%.

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

Unlike in the afternoon, when flights are generally more expensive, you can save up to 37% on flights from Denver to St Louis by exploring options for tickets in the evening.

Cheap flights from Denver to St Louis in December, January 2021

The best prices found for DEN to STL flights for December, January
14 Jan - 18 Jan
$49pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
11 Jan - 18 Jan
$57pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
24 Dec - 31 Dec
$69pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl

Denver to St Louis 2021 flight deals

Cheap flights to St Louis from Denver found for this year
24 Dec - 31 Dec
$69pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
3 Dec - 6 Dec
$70pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
31 Dec - 4 Jan
$75pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl

Non-stop flights to St Louis from Denver

Save time with Denver to St Louis direct flight deals
14 Jan - 18 Jan
$49pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
11 Jan - 18 Jan
$57pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
24 Dec - 31 Dec
$69pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl

Last minute flights from Denver to St Louis

Late deals on round-trip flights to St Louis from Denver, departing today and this week
11 Dec - 24 Dec
$76pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
10 Dec - 25 Dec
$87pp
DEN
Denver Intl
Multiple Airlines
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
Non-Stop
DEN
Denver Intl
9 Dec - 24 Dec
$90pp
DEN
Denver Intl
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl

One-way flights to St Louis from Denver

The cheapest one-way flights from Denver to St Louis
1:00 pm - 4:11 pm
United Airlines
Nonstop
2h 11m
DEN - STL
United Airlines
$49
United
8:48 am - 3:13 pm
American Airlines
1 Stop
5h 25m
DEN - STL
American Airlines
5:59 pm - 6:04 am
Frontier
1 Stop
11h 05m
DEN - STL
Frontier
$85
FlightNetwork

Related info for your journey

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

Flight FAQs

From Denver to St Louis

Are flight prices decreasing from Denver to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Denver and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Denver Intl to Lambert-St Louis to control the spread of COVID-19?

New policies can now be found on Delta to help keep travelers safe while flying. Some of the new policies that have been implemented to accommodate travelers flying from Denver Intl to Lambert-St Louis are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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

Some of the carriers operating flights from Denver Intl to Lambert-St Louis 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 Denver to St Louis for under $100 on Cheapflights?

Yes, there are multiple flights from Denver to St Louis for under $100. The cheapest flight booked recently is on Frontier for just $49, but on average you can expect to pay $82.

Are there nonstop flights from Denver to St Louis for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Denver to St Louis under $100. A good price for a nonstop flight from Denver to St Louis is less than $101.

Are there last-minute flights available from Denver to St Louis for under $100?

There are currently 20+ open flights from Denver to St Louis within the next 7 days for less than $100.

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

You can find nonstop flights on the following days: Thursday.

How popular is this flight route?

Within the past month, 130 users have taken a look at flights from Denver Intl to Lambert-St Louis.

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

Travelers can expect 1 flight from Denver Intl to Lambert-St Louis on average per day.
Morning (6am - Noon) - 100% of flight departures

Does it rain more in Denver or St Louis?

In Denver, there will be less rainfall in Denver compared to St Louis over the next 5 days.

Is Denver weather warmer or cooler than St Louis?

We forecast the temperature to be around the 90 °F's in July, on average. The temperature in St Louis is generally the same as in Denver. Book flights in a timely manner in correlation to your departure date.

How long is the flight from Denver to St Louis?

Airlines like Frontier and American Airlines fly from Denver to St Louis in about 1h 58m. The time it takes to get you to your destination can typically vary by up to 2h 53m. Airlines will cover a distance of 772 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from Denver to St Louis round-trip?

Frontier, at $49, was found to be the cheapest airline from Denver to St Louis. An alternate airline flying to your destination would be American Airlines. Frontier is currently priced 70% below the average price you’ll pay for this route.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $24. United Airlines flights start at $49 while deals on American Airlines start at $53 one-way.

Alternative routes for Denver to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Denver to St Louis
Flight duration
2h 14m
Average temperature for December in St Louis
46.4 °F
Avg rainfall for December in St Louis
2.5 ″

Airports servicing Denver

Airports servicing St. Louis

Top 5 airlines from Denver to St Louis

The chart below displays the airlines Cheapflights users traveling from Denver to St Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$51 $144 No cancel fee 62%
American Airlines
$57 $156 No cancel fee 71%
Delta
$77 $225 No cancel fee N/A
Southwest
$63 $250 No cancel fee 63%
United Airlines
$85 $260 No cancel fee 69%

Hourly flight availability from Denver to St Louis

Morning 6 AM to noon 50% of DEN to STL departures
Afternoon Noon to 6 PM 37% of DEN to STL departures
Early morning Midnight to 6 AM 7% of DEN to STL departures
Evening 6 PM to midnight 6% of DEN to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Denver to St Louis
Sunday
2 daily flights
Monday
2 daily flights
Tuesday
13 daily flights
Wednesday
2 daily flights
Thursday
2 daily flights
Friday
2 daily flights
Saturday
2 daily flights
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