How many flights from St. Louis to Denver are non-stop?

Across the trailing quarter, approximately 36.9% of flights from St. Louis to Denver have historically been non-stop. For flights that do include stopovers, the median number of stops observed is 2. This means that while direct options are available, a significant portion of routes involve at least one connection. Travelers prioritizing direct flights should be aware of this distribution.

How many hours is the flight from St. Louis to Denver?

The typical direct flight from St. Louis to Denver has a median duration of 2 hours and 33 minutes, covering a distance of 1236 kilometers. Flights with one stop, however, are considerably longer, with a median duration of 7 hours and 24 minutes. This difference highlights the time-saving benefit of choosing a non-stop option for this route. Travelers should factor in these durations when planning their journey.

How often do St. Louis to Denver flight prices drop?

Historically, flight prices for the St. Louis to Denver route are classified as experiencing frequent drops. This indicates that price fluctuations are common, and opportunities for finding deals arise regularly. Travelers monitoring this route can often find favorable pricing if they track fares over time. The frequent nature of these price changes suggests a dynamic market for this particular flight path.

Flights From St. Louis

To Denver

Cheap Flights from St. Louis to Denver

Browse current best options from St. Louis. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

St. Louis

RatePunk searches hundreds of travel sites at once for deals on flights to Denver

Prices updated 10 days ago

406 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Aug 2, 2026.)

Today’s best flight deals from St. Louis to Denver

Explore current cheapest deals departing from St. Louis to Denver

2026-09-11 – 2026-09-13
STL - Denver
75% AI deal score
$132
$75
Round trip
2026-09-11 – 2026-10-09
STL - Denver
66% AI deal score
$104
$80
Round trip
2026-09-11 – 2026-09-16
STL - Denver
74% AI deal score
$129
$80
Round trip
2026-09-11 – 2026-09-25
STL - Denver
71% AI deal score
$109
$80
Round trip
2026-09-11 – 2026-10-07
STL - Denver
66% AI deal score
$104
$80
Round trip
2026-09-11 – 2026-10-02
STL - Denver
66% AI deal score
$104
$80
Round trip
2026-09-11 – 2026-09-23
STL - Denver
71% AI deal score
$109
$80
Round trip
2026-09-11 – 2026-09-30
STL - Denver
66% AI deal score
$104
$80
Round trip
2026-09-06 – 2026-09-11
STL - Denver
72% AI deal score
$129
$85
Round trip
2026-09-11 – 2026-09-12
STL - Denver
73% AI deal score
$131
$85
Round trip

St. Louis to Denver: Overview

Insights for flights from St. Louis to Denver

Flights from St. Louis to Denver typically cover a distance of 1236 kilometers, classifying this as a short-haul route. This means you can expect a relatively quick journey between these two cities. The price range for this route is typically $169–$638, with a median of $391. Right now, fares are below the typical level, and about 15% of recent fares have been classified as a good price. New deals appear almost daily, making it easier to find cheap flights from St. Louis to Denver.

If you are looking for the cheapest time to fly from St. Louis to Denver, the data indicates that April is often the most affordable month, with a median fare of $95. Following closely, May also offers competitive prices, with a median of $104. August is another good option for budget-conscious travelers, showing a median fare of $170.

When flying from St. Louis to Denver, most itineraries connect at least once, with only 36.9% of recent fares being non-stop. For those itineraries that include connections, the typical number of stopovers is 2. This means you should factor in additional travel time if your flight is not direct.

The typical journey time for flights from St. Louis to Denver is 2h 33m. This duration reflects the median flight time for all itineraries, including both direct and connecting options. For direct flights, the median travel time is also 2h 33m, while connecting flights have a significantly longer median journey of 14h 29m.

How much is a round trip from St. Louis to Denver

Regular price: $98 - $274

Prices are currently below the regular range for flights from St. Louis to Denver.

The regular price range for flights from St. Louis to Denver is $98 to $274. The current lowest deal is $76 with Frontier Airlines for travel from Sep 13-Sep 16.

now $76

Low $98

High $274

The cheapest time to fly from St. Louis to Denver

The cheapest month to fly from St. Louis to Denver is May, with a median price of $109. The most expensive month is June, with a median price of $540. Prices are generally lower from January to October.

May

Cheapest

Flights from $109

June

Most Expensive

Flights from $540

Jan

Feb

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Denver

Frontier Airlines

Last-minute flights going from St. Louis to Denver

Mon, Aug 10

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$506

$349

One-way

Tue, Aug 11

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$506

$339

One-way

Tue, Aug 11

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$518

$348

One-way

Thu, Aug 13

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$486

$339

One-way

Fri, Aug 14

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$498

$339

One-way

Fri, Aug 14

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$486

$339

One-way

Biggest price drops on these dates for flights from St. Louis to Denver

2 nights

Aug 11 - Aug 13

$518 → $349

33%

2 nights

Aug 14 - Aug 16

$498 → $339

32%

3 nights

Aug 10 - Aug 13

$506 → $349

31%

3 nights

Aug 14 - Aug 17

$486 → $339

30%

Popular Airports to fly from St. Louis to Denver

St. Louis - Denver route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares from St. Louis to Denver have been below the typical level at $76.

📅 Best time to fly

Fly in May for the lowest median prices.

Historically, May has offered the lowest median prices at $109 for St. Louis to Denver flights.

⏱️ Flight duration

Direct flights take 2h 33m.

The typical direct flight duration from St. Louis to Denver is 2 hours and 33 minutes.

✈️ Airlines & availability

Frontier Airlines offers direct flights.

Frontier Airlines is available for direct flights from St. Louis to Denver.

🏆 Airline highlight

Frontier Airlines has a direct deal for $76.

Frontier Airlines offers a direct flight deal for $76 from St. Louis to Denver.

🎯 Booking tip

Deals are frequent on this route.

Deals for flights from St. Louis to Denver are frequent, appearing within a 30-day window.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a convenient option for flights from St. Louis to Denver.

📍 ~20 km from St. Louis (reachable by car)

💸 Flights from ~$96

Denver main airports to arrive at

Denver International (DEN)

Cheapest

Denver International Airport is the primary arrival airport for flights to Denver from St. Louis.

📍 ~30 km from Denver city center (reachable by car)

💸 Flights from ~$96

Airports nearby Denver used as alternative

Colorado Springs (COS)

Colorado Springs (COS) is a reliable alternative due to its size and robust flight schedule.

📍 ~100 km from Denver (reachable by car)

💸 Flights from ~$332

Business & First Class Flight Deals to Denver

Discover luxury on the budget with premium cabin class on flights from St. Louis to Denver.

Elite

Best Elite deals to Denver

Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.

From STL

Elite

Aug 31

Denver, United States

81% AI deal score

$975

$537

Save $438

United Airlines

Business Class

From STL

Elite

Aug 31

Denver, United States

80% AI deal score

$963

$572

Save $391

United Airlines

Business Class

From STL

Elite

Sep 07

Denver, United States

77% AI deal score

$2,341

$1,297

Save $1,044

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 07

Denver, United States

77% AI deal score

$2,520

$1,322

Save $1,198

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 08

Denver, United States

76% AI deal score

$2,338

$1,297

Save $1,041

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 08

Denver, United States

76% AI deal score

$2,344

$1,297

Save $1,047

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 07

Denver, United States

76% AI deal score

$2,339

$1,297

Save $1,042

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 14

Denver, United States

76% AI deal score

$2,512

$1,382

Save $1,130

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 15

Denver, United States

76% AI deal score

$2,542

$1,392

Save $1,150

Alaska Airlines, Inc.

Business Class

From STL

Elite

Sep 06

Denver, United States

76% AI deal score

$659

$506

Save $153

United Airlines

Business Class

From STL

Elite

Sep 09

Denver, United States

76% AI deal score

$723

$525

Save $198

United Airlines

Business Class

From STL

Elite

Oct 28

Denver, United States

76% AI deal score

$743

$525

Save $218

United Airlines

Business Class

Frequently Asked Questions About Flights to Denver

Historically, the optimal booking window for flights from St. Louis to Denver is between 28 and 59 days prior to departure. During this period, the average price for a ticket has been observed at approximately $151. Prices tend to be significantly higher outside this window, with tickets purchased 0-6 days out averaging around $444 and those bought 14-27 days out averaging $451. Planning your purchase within the recommended 28-59 day timeframe can lead to considerable savings.

A flight from St. Louis to Denver is typically considered a good deal if you find it for $169 or less. This threshold represents the lower 25% of prices observed across the trailing 90 days. The median price for this route historically stands at $391, while prices in the upper quartile can reach $638 or more. Aiming for a fare at or below $169 indicates a favorable price.

Historically, the cheapest months to fly from St. Louis to Denver are April and May, with median prices of $95 and $104 respectively. August also presents a more affordable option, with a median price of $170. The annual median price for this route is $391, indicating that these months offer substantial savings compared to the yearly average. Travelers looking for lower fares should consider these months for their trips.

Related routes

More routes from St. Louis

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Flights to Denver from other cities

Flights from Albuquerque to Denver Flights from Anchorage to Denver Flights from Atlanta to Denver Flights from Austin to Denver Flights from Billings to Denver Flights from Boston to Denver Flights from Cedar Rapids to Denver Flights from Chicago to Denver Flights from Nashville to Denver Flights from Tampa to Denver Flights from Tucson to Denver Flights from Washington, D.C. to Denver

St. Louis to Denver: Overview

Insights for flights from St. Louis to Denver

How much is a round trip from St. Louis to Denver

Regular price: $98 - $274

Prices are currently below the regular range for flights from St. Louis to Denver.

The regular price range for flights from St. Louis to Denver is $98 to $274. The current lowest deal is $76 with Frontier Airlines for travel from Sep 13-Sep 16.

now $76

Low $98

High $274

The cheapest time to fly from St. Louis to Denver

May

Cheapest

Flights from $109

June

Most Expensive

Flights from $540

Jan

Feb

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Denver

Frontier Airlines

Last-minute flights going from St. Louis to Denver

Mon, Aug 10

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$506

$349

One-way

Tue, Aug 11

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$506

$339

One-way

Tue, Aug 11

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$518

$348

One-way

Thu, Aug 13

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$486

$339

One-way

Fri, Aug 14

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$498

$339

One-way

Fri, Aug 14

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$486

$339

One-way

Biggest price drops on these dates for flights from St. Louis to Denver

2 nights

Aug 11 - Aug 13

$518 → $349

33%

2 nights

Aug 14 - Aug 16

$498 → $339

32%

3 nights

Aug 10 - Aug 13

$506 → $349

31%

3 nights

Aug 14 - Aug 17

$486 → $339

30%

Popular Airports to fly from St. Louis to Denver

St. Louis - Denver route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares from St. Louis to Denver have been below the typical level at $76.

📅 Best time to fly

Fly in May for the lowest median prices.

Historically, May has offered the lowest median prices at $109 for St. Louis to Denver flights.

⏱️ Flight duration

Direct flights take 2h 33m.

The typical direct flight duration from St. Louis to Denver is 2 hours and 33 minutes.

✈️ Airlines & availability

Frontier Airlines offers direct flights.

Frontier Airlines is available for direct flights from St. Louis to Denver.

🏆 Airline highlight

Frontier Airlines has a direct deal for $76.

Frontier Airlines offers a direct flight deal for $76 from St. Louis to Denver.

🎯 Booking tip

Deals are frequent on this route.

Deals for flights from St. Louis to Denver are frequent, appearing within a 30-day window.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a convenient option for flights from St. Louis to Denver.

📍 ~20 km from St. Louis (reachable by car)

💸 Flights from ~$96

Denver main airports to arrive at

Denver International (DEN)

Cheapest

Denver International Airport is the primary arrival airport for flights to Denver from St. Louis.

📍 ~30 km from Denver city center (reachable by car)

💸 Flights from ~$96

Airports nearby Denver used as alternative

Colorado Springs (COS)

Colorado Springs (COS) is a reliable alternative due to its size and robust flight schedule.

Denver, United States

76% AI deal score

$743

$525

Save $218

United Airlines

Business Class

Frequently Asked Questions About Flights to Denver

Cheap Flights from St. Louis to Denver

Today’s best flight deals from St. Louis to Denver

St. Louis to Denver: Overview

Insights for flights from St. Louis to Denver

How much is a round trip from St. Louis to Denver

The cheapest time to fly from St. Louis to Denver

Direct flights from St. Louis to Denver

Last-minute flights going from St. Louis to Denver

Biggest price drops on these dates for flights from St. Louis to Denver

Popular Airports to fly from St. Louis to Denver

St. Louis - Denver route insights

Recent fares are below the typical level.

Fly in May for the lowest median prices.

Direct flights take 2h 33m.

Frontier Airlines offers direct flights.

Frontier Airlines has a direct deal for $76.

Deals are frequent on this route.

St. Louis main airports to depart from

Denver main airports to arrive at

Airports nearby Denver used as alternative

Business & First Class Flight Deals to Denver

Best Elite deals to Denver

Aug 31

Aug 31

Sep 07

Sep 07

Sep 08

Sep 08

Sep 07

Sep 14

Sep 15

Sep 06

Sep 09

Oct 28

Frequently Asked Questions About Flights to Denver

When should I buy St. Louis to Denver tickets?

How do I know if a St. Louis to Denver flight is a good deal?

When is the cheapest time of year to fly from St. Louis to Denver?

How many flights from St. Louis to Denver are non-stop?

How many hours is the flight from St. Louis to Denver?

How often do St. Louis to Denver flight prices drop?

Related routes

More routes from St. Louis

Flights to Denver from other cities

St. Louis to Denver: Overview

Insights for flights from St. Louis to Denver

How much is a round trip from St. Louis to Denver

The cheapest time to fly from St. Louis to Denver

Direct flights from St. Louis to Denver

Last-minute flights going from St. Louis to Denver

Biggest price drops on these dates for flights from St. Louis to Denver

Popular Airports to fly from St. Louis to Denver

St. Louis - Denver route insights

Recent fares are below the typical level.

Fly in May for the lowest median prices.

Direct flights take 2h 33m.

Frontier Airlines offers direct flights.

Frontier Airlines has a direct deal for $76.

Deals are frequent on this route.

St. Louis main airports to depart from

Denver main airports to arrive at

Airports nearby Denver used as alternative

Business & First Class Flight Deals to Denver

Best Elite deals to Denver

Aug 31

Aug 31

Sep 07

Sep 07

Sep 08

Sep 08

Sep 07

Sep 14

Sep 15

Sep 06

Sep 09

Oct 28

Frequently Asked Questions About Flights to Denver

When should I buy St. Louis to Denver tickets?

How do I know if a St. Louis to Denver flight is a good deal?

When is the cheapest time of year to fly from St. Louis to Denver?