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

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

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

All the information you need to plan the best DEN to STL flight in 2022: compare Denver to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
DEN - STL
Price
$121 - $261
STL
Temperature
32 - 80.6 °F
STL
Rainfall
2.2 - 4.7 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 Intl to Lambert-St Louis

One-way from

$118

One-way flight from Denver Intl to Lambert-St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Denver to St. Louis?

Users have found that booking a flight from Denver to St. Louis at least 14 days early can save you up to 14% on average compared to booking a flight this week. If booking 14 days before your flight isn’t an option for you, users have found flights from Denver to St. Louis for as little as $133 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $165 for flights departing within the next 3 days.

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

It’s optimal to fly from Denver to St. Louis in the morning. By choosing this option you can save up to 20% on the cost of your flight, compared to a flight at noon.

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

Flights from Denver to St. Louis lean towards being more expensive in December. Prices are generally better when you fly from Denver to St. Louis in October, with the cheapest ticket starting at $77.

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

Users have found that flying from Denver to St. Louis on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

The best prices found for DEN to STL flights for May, June
7 Jun - 10 Jun
$170pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
7 Jun - 8 Jun
$180pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
27 May - 29 May
$182pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl

Denver Intl to St. Louis 2022 flight deals

Cheap flights to St. Louis from Denver found for this year
7 Jun - 10 Jun
$170pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
7 Jun - 8 Jun
$180pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
27 May - 29 May
$182pp
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
7 Jun - 10 Jun
$170pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
7 Jun - 8 Jun
$180pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
9 Jun - 15 Jun
$188pp
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
29 May - 31 May
$180pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
27 May - 29 May
$182pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl
24 May - 7 Jun
$190pp
DEN
Denver Intl
Frontier
Non-Stop
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
Non-Stop
DEN
Denver Intl

One-way flights to Lambert-St Louis from Denver

The cheapest one-way flights from Denver to St. Louis
10:43 am - 7:16 pm
American Airlines
1 Stop
7h 33m
DEN - STL
American Airlines
8:31 am - 4:22 pm
Spirit Airlines
1 Stop
6h 51m
DEN - STL
Spirit Airlines
$142
mytrip.com
8:59 pm - 10:13 am
Frontier
1 Stop
12h 14m
DEN - STL
Frontier
$162
Flights by SU

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Denver</span> to <span class="emphasized">St. Louis</span> flights.

Flight FAQs

From Denver to St. Louis

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

To fly from Denver to St. Louis, you need to book a flight from Denver Intl (DEN) to Lambert-St Louis (STL). Nonstop flights to Lambert-St Louis from Denver Intl take 1h 59m on average. When it comes time to book airfare, you have a few options: there are 13 outbound flights from Denver Intl to Lambert-St Louis offered by 8 different airlines.

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 Major Airline. 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 $200 on Cheapflights?

Yes, there are multiple flights from Denver to St. Louis for under $200. The cheapest flight booked recently is on Frontier for just $170, but on average you can expect to pay $219.

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

Cheapflights has at least 20 direct flights from Denver to St. Louis under $200. A good price for a nonstop flight from Denver to St. Louis is less than $232.

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

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

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

Nonstop flights are available for this route on the following days: Friday, Saturday.

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

Within the past month, 27 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?

On average 1 flight departs from Denver to St. Louis per day.
Early Morning (Midnight to 6am) - 100% of flight departures

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

A quick flight from Denver to St. Louis can take about 2h 05m. Frontier provides one of the quickest options available for as low as $170. The distance from Denver to St. Louis is about 772 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

Our cheapest airline available from Denver to St. Louis is Frontier. Our recent data shows that you can find tickets from as low as $170 on this airline. An additional option worth looking into is Spirit Airlines, starting at $238.

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

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $77. Users have also found prices from $118 and $134 on American Airlines and Spirit Airlines, respectively.

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

While on average a flight from Denver to St. Louis is generally $406, our data shows the cheapest flight currently is $49. When looking at the most popular route, (Denver Intl - Lambert-St Louis), you can expect to pay $230 for that flight.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to St. Louis on time: Frontier (84%), Air Canada (82%), SkyWest Airlines (80%).

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

Consider Major Airline, American Airlines or Delta when booking your flight. These represent the most popular airlines when flying from Denver to St. Louis.

COVID Restrictions

View COVID Travel Restrictions for St. Louis, MO

Do I need a COVID test to fly to St. Louis from Denver?

Information is based on travel restrictions for travel to Lambert-St Louis within the United States

Most visitors from Denver Intl need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.

COVID-19 testing requirements
Visitors from Denver Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Lambert-St Louis.

Quarantine requirements
Visitors from Denver Intl are not required to quarantine after entering Lambert-St Louis.

Do I need a test to fly back to Denver from St. Louis?

Returning to Denver Intl from Lambert-St Louis

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Denver Intl.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Denver Intl.

Hide COVID Travel Restrictions for St. Louis, MO

Alternative routes for Denver to St. Louis

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

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Denver to St. Louis.
Flight duration from DEN to STL
2h 15m
Average temperature for May in St. Louis
78.8 °F
Avg rainfall for May in St. Louis
5.1 ″

Airports servicing Denver

Airports servicing St. Louis

Top 5 airlines flying from Denver Intl to Lambert-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
Juneyao Airlines
$12 $18 No cancel fee 66%

We couldn't confirm the COVID-19 safety measures taken by Juneyao Airlines. Please check directly on their website for additional information.

Frontier
$54 $158 No cancel fee 62%
American Airlines
$75 $150 No cancel fee 71%
United Airlines
$98 $237 No cancel fee 69%
Delta
$107 $217 No cancel fee N/A

Hourly flight availability from Denver to St. Louis

See what time of day planes typically take off from Denver towards St. Louis.
Afternoon Noon to 6 PM 54% of DEN to STL departures
Morning 6 AM to noon 22% of DEN to STL departures
Evening 6 PM to midnight 20% of DEN to STL departures
Early morning Midnight to 6 AM 4% of DEN to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Denver to St. Louis
See how many times per day planes take to the skies headed from Denver to St. Louis.
Sunday
10 daily flights
Monday
16 daily flights
Tuesday
14 daily flights
Wednesday
16 daily flights
Thursday
16 daily flights
Friday
16 daily flights
Saturday
3 daily flights
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