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

In the trailing 90 days, approximately 36.9% of flights from St. Louis to Denver were non-stop. For flights that included stopovers, the median number of stopovers was 2. This suggests that while direct options are available, a significant portion of routes involve at least one connection. Travelers should consider this when planning their journey.

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. For flights with one stop, the median duration is considerably longer, averaging 7 hours and 24 minutes. The air distance between the two cities is approximately 1236 kilometers. Travelers should account for these differences in flight time when choosing between direct and connecting options.

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

Historically, flight prices for the St. Louis to Denver route have shown frequent drops. This indicates that price fluctuations are common for this specific route. Travelers may find it beneficial to monitor prices regularly to take advantage of these frequent changes. This pattern has been observed across the trailing 30 days.

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 7 days ago

454 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 24, 2026.)

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

Explore current cheapest deals departing from St. Louis to Denver

2026-10-03 – 2026-10-05
STL - Denver
78% AI deal score
$125
$62
Round trip
2026-09-26 – 2026-09-30
STL - Denver
78% AI deal score
$130
$67
Round trip
2026-09-23 – 2026-09-26
STL - Denver
75% AI deal score
$132
$76
Round trip
2026-09-16 – 2026-09-19
STL - Denver
75% AI deal score
$132
$76
Round trip
2026-09-14 – 2026-09-16
STL - Denver
75% AI deal score
$134
$76
Round trip
2026-10-10 – 2026-10-17
STL - Denver
73% AI deal score
$119
$79
Round trip
2026-09-12 – 2026-09-14
STL - Denver
73% AI deal score
$135
$86
Round trip
2026-09-19 – 2026-09-23
STL - Denver
72% AI deal score
$131
$86
Round trip
2026-09-14 – 2026-09-19
STL - Denver
72% AI deal score
$130
$86
Round trip
2026-09-18 – 2026-09-26
STL - Denver
71% AI deal score
$119
$86
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: $94 - $308

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

The regular price range for this route is $94 to $308. The current lowest deal is $62 with Frontier Airlines for travel from Oct 3-Oct 5.

now $62

Low $94

High $308

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

Tue, Sep 1

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$391

$296

One-way

Wed, Sep 2

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$423

$306

One-way

Thu, Sep 3

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$423

$298

One-way

Thu, Sep 3

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$421

$318

One-way

Fri, Sep 4

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$377

$290

One-way

Fri, Sep 4

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$421

$291

One-way

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

2 nights

Aug 28 - Aug 30

$498 → $329

34%

1 night

Sep 9 - Sep 10

$258 → $117

55%

2 nights

Sep 24 - Sep 26

$246 → $107

57%

3 nights

Sep 21 - Sep 24

$246 → $107

57%

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 are below the typical level for this route.

📅 Best time to fly

April, May, and August offer the lowest median prices

Historically, April ($95), May ($104), and August ($170) have offered the lowest median prices.

⏱️ Flight duration

Direct flights average 2h 33m

Direct flights to Denver typically take 2h 33m, while connecting flights average 14h 29m.

✈️ Airlines & availability

Frontier Airlines offers direct flights

Frontier Airlines has direct flights available for the St. Louis to Denver route.

🏆 Airline highlight

Frontier Airlines has a deal for $62

Frontier Airlines has a deal for $62 from October 3-October 5.

🎯 Booking tip

Deals are frequent on this route

Deals on 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

Oct 03

Denver, United States

82% AI deal score

$979

$546

Save $433

United Airlines

Business Class

From STL

Elite

Oct 28

Denver, United States

79% AI deal score

$737

$477

Save $260

United Airlines

Business Class

From STL

Elite

Sep 26

Denver, United States

79% AI deal score

$715

$477

Save $238

United Airlines

Business Class

From STL

Elite

Nov 02

Denver, United States

79% AI deal score

$773

$477

Save $296

United Airlines

Business Class

From STL

Elite

Oct 21

Denver, United States

78% AI deal score

$709

$477

Save $232

United Airlines

Business Class

From STL

Elite

Oct 29

Denver, United States

78% AI deal score

$699

$477

Save $222

United Airlines

Business Class

From STL

Elite

Sep 30

Denver, United States

78% AI deal score

$736

$495

Save $241

United Airlines

Business Class

From STL

Elite

Oct 10

Denver, United States

76% AI deal score

$664

$495

Save $169

United Airlines

Business Class

From STL

Elite

Dec 25

Denver, United States

76% AI deal score

$700

$513

Save $187

United Airlines

Business Class

From STL

Elite

Oct 15

Denver, United States

76% AI deal score

$760

$536

Save $224

United Airlines

Business Class

From STL

Elite

Oct 28

Denver, United States

75% AI deal score

$627

$477

Save $150

United Airlines

Business Class

From STL

Elite

Sep 28

Denver, United States

75% AI deal score

$688

$536

Save $152

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 was around $151. Prices tend to be higher outside this window, with flights booked 0-6 days out averaging $444 and those booked 14-27 days out averaging $451. Planning your purchase within this timeframe can lead to more favorable pricing.

Across the trailing quarter, a good deal for a flight from St. Louis to Denver was considered to be $169 or less. The median price for this route during the same period was $391. Prices can vary, with 75% of observed fares being $638 or less. Keeping an eye out for prices at or below the $169 threshold typically indicates a favorable offer.

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 shows a relatively low median price of $170. In contrast, the annual median price for this route is $391, indicating that these specific months offer significant savings. Travelers looking for the most economical options should consider these months.

Related routes

More routes from St. Louis

Flights from St. Louis to Dubai Flights from St. Louis to Dublin Flights from St. Louis to Fayetteville Flights from St. Louis to Florence Flights from St. Louis to Frankfurt Flights from St. Louis to Hong Kong Flights from St. Louis to Houston Flights from St. Louis to Istanbul Flights from St. Louis to Las Vegas Flights from St. Louis to Lisbon Flights from St. Louis to Los Angeles Flights from St. Louis to Madrid

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: $94 - $308

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

The regular price range for this route is $94 to $308. The current lowest deal is $62 with Frontier Airlines for travel from Oct 3-Oct 5.

now $62

Low $94

High $308

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

Tue, Sep 1

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$391

$296

One-way

Wed, Sep 2

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$423

$306

One-way

Thu, Sep 3

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$423

$298

One-way

Thu, Sep 3

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$421

$318

One-way

Fri, Sep 4

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$377

$290

One-way

Fri, Sep 4

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$421

$291

One-way

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

2 nights

Aug 28 - Aug 30

$498 → $329

34%

1 night

Sep 9 - Sep 10

$258 → $117

55%

2 nights

Sep 24 - Sep 26

$246 → $107

57%

3 nights

Sep 21 - Sep 24

$246 → $107

57%

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 are below the typical level for this route.

📅 Best time to fly

April, May, and August offer the lowest median prices

Historically, April ($95), May ($104), and August ($170) have offered the lowest median prices.

⏱️ Flight duration

Direct flights average 2h 33m

Direct flights to Denver typically take 2h 33m, while connecting flights average 14h 29m.

✈️ Airlines & availability

Frontier Airlines offers direct flights

Frontier Airlines has direct flights available for the St. Louis to Denver route.

🏆 Airline highlight

Frontier Airlines has a deal for $62

Frontier Airlines has a deal for $62 from October 3-October 5.

🎯 Booking tip

Deals are frequent on this route

Deals on 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

75% AI deal score

$688

$536

Save $152

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

April, May, and August offer the lowest median prices

Direct flights average 2h 33m

Frontier Airlines offers direct flights

Frontier Airlines has a deal for $62

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

Oct 03

Oct 28

Sep 26

Nov 02

Oct 21

Oct 29

Sep 30

Oct 10

Dec 25

Oct 15

Oct 28

Sep 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

April, May, and August offer the lowest median prices

Direct flights average 2h 33m

Frontier Airlines offers direct flights

Frontier Airlines has a deal for $62

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

Oct 03

Oct 28

Sep 26

Nov 02

Oct 21

Oct 29

Sep 30

Oct 10

Dec 25

Oct 15

Oct 28

Sep 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?