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

Historically, approximately 12.8% of flights from St. Louis to Denver are non-stop. For flights that include stopovers, the median number of stops is typically two. This indicates that a significant majority of routes on this path will involve at least one connection. Travelers seeking direct routes should be aware of this lower percentage.

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

The median direct flight time from St. Louis to Denver is 2 hours and 27 minutes. This route covers a distance of 1236 kilometers. For flights with one stop, the median duration significantly increases to 11 hours and 1 minute. Travelers should account for these differences in duration when planning their journey.

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

Historically, flight prices for the St. Louis to Denver route experience regular price drops. This pattern suggests that travelers may frequently find opportunities to secure more favorable fares. Monitoring prices consistently can be beneficial for those looking to book this route. The regular classification indicates consistent price fluctuations.

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 4 days ago

476 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Oct 12, 2026.)

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

Explore current cheapest deals departing from St. Louis to Denver

2027-02-22 – 2027-03-03
STL - Denver
50% AI deal score
$119
$94
Round trip
2027-02-22 – 2027-02-24
STL - Denver
65% AI deal score
$122
$94
Round trip
2027-03-01 – 2027-03-03
STL - Denver
72% AI deal score
$138
$94
Round trip
2027-02-24 – 2027-02-27
STL - Denver
65% AI deal score
$123
$94
Round trip
2027-02-03 – 2027-02-06
STL - Denver
49% AI deal score
$116
$94
Round trip
2027-02-27 – 2027-03-03
STL - Denver
66% AI deal score
$125
$94
Round trip
2027-02-03 – 2027-03-03
STL - Denver
46% AI deal score
$105
$94
Round trip
2027-02-03 – 2027-02-24
STL - Denver
46% AI deal score
$105
$94
Round trip
2027-02-22 – 2027-02-27
STL - Denver
65% AI deal score
$122
$94
Round trip
2027-02-24 – 2027-03-03
STL - Denver
65% AI deal score
$121
$94
Round trip

St. Louis to Denver: Overview

Insights for flights from St. Louis to Denver

Fares for flights from St. Louis to Denver typically range from $322–$796, with a median of $509. Right now, fares are near the typical level for this route. Only 3% of recent fares were classified as a good price, indicating that finding significantly cheaper flights can be challenging.

If you are looking for cheap flights from St. Louis to Denver, the data suggests that February is often the most affordable month to fly, with a median fare of $174. July also presents a more budget-friendly option, with a median fare of $250. October follows as a third option, with a median fare of $447.

When flying from St. Louis to Denver, most itineraries connect at least once, with only 12.8% of recent fares being non-stop. For connecting itineraries, the typical number of connections is 2.

A typical journey from St. Louis to Denver takes approximately 2h 27m. This duration reflects the median flight time for all itineraries, including those with connections. For direct flights from St. Louis to Denver, the median flight time is also 2h 27m, while connecting flights have a significantly longer median journey of 30h 8m.

The route from St. Louis to Denver covers a distance of 1236 kilometers, classifying it as a short-haul flight. This distance typically translates to a relatively quick travel experience, especially for direct flights.

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

Regular price: $95 - $267

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

The regular price range for this route is $95 to $267. The current lowest deal is $94 with Frontier Airlines, for travel from Feb 24-Feb 27.

now $94

Low $95

High $267

The cheapest time to fly from St. Louis to Denver

The cheapest month to fly from St. Louis to Denver is February, with a median price of $138. The most expensive month is August, with a median price of $960. Prices are generally lower from January to October.

February

Cheapest

Flights from $138

August

Most Expensive

Flights from $960

Jan

Feb

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Denver

Frontier Airlines

Last-minute flights going from St. Louis to Denver

Fri, Oct 23

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$130

$228

One-way

Thu, Nov 5

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Southwest Airlines

$119

$262

One-way

Sun, Nov 8

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

United Airlines

$100

$324

One-way

Wed, Nov 18

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Southwest Airlines

$116

$241

One-way

Fri, Nov 20

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$118

$237

One-way

Wed, Nov 25

⌛ Last-Minute

STL - Denver

St. Louis (STL) - Denver (DEN)

Frontier Airlines

$222

$260

One-way

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

2 nights

Nov 21 - Nov 23

$225 → $134

40%

2 nights

Nov 6 - Nov 8

$228 → $161

29%

2 nights

Nov 13 - Nov 15

$226 → $167

26%

4 nights

Dec 12 - Dec 16

$128 → $86

33%

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 near the typical level for this route.

📅 Best time to fly

February is historically cheapest at $174

Historically, February is the cheapest month to fly, with a median price of $174.

⏱️ Flight duration

Direct flights average 2h 27m

Direct flights to Denver typically take 2 hours and 27 minutes, connecting flights average 30 hours 8 minutes.

✈️ Airlines & availability

Connecting flights are dominant

Only 12.8% of recent flights from St. Louis to Denver are direct.

🏆 Airline highlight

Frontier Airlines offers direct flights

Frontier Airlines offers direct flights from St. Louis to Denver, with 1 direct deal found.

🎯 Booking tip

Deals appear regularly

Deals for flights from St. Louis to Denver appear regularly, about every 30 days.

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 or train)

💸 Flights from ~$80

Denver main airports to arrive at

Denver International (DEN)

Cheapest

Denver International Airport is ideal for reaching Denver and the surrounding Colorado areas from St. Louis.

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

💸 Flights from ~$80

Airports nearby Denver used as alternative

Colorado Springs (COS)

Colorado Springs (COS) is a reliable alternative for Denver with robust flight schedules and major carriers.

📍 ~110 km from destination city (reachable by car)

💸 Flights from ~$495

Business & First Class Flight Deals to Denver

$590

Save $78

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, where the average price is $489. Prices tend to increase significantly closer to the departure date, with flights booked 0-6 days out averaging $1050. Even booking too far in advance, over 60 days out, typically results in higher average prices of $691. Planning within this 28-59 day window can lead to more favorable fares.

Across the trailing quarter, a flight from St. Louis to Denver is considered a good deal if it is priced at or below $322. The median price for this route historically stands at $509. Prices exceeding $796 are typically in the more expensive range. By aiming for fares at or below the $322 threshold, travelers can identify a favorable price.

Historically, February and July tend to be the cheapest months to fly from St. Louis to Denver, with median prices of $174 and $250, respectively. In contrast, October has historically been the most expensive month, with a median price of $447. The annual median price for this route is typically around $509. Travelers looking for lower fares should consider flying in February or July.

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Flights to Denver from other cities

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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: $95 - $267

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

The regular price range for this route is $95 to $267. The current lowest deal is $94 with Frontier Airlines, for travel from Feb 24-Feb 27.

now $94

Low $95

High $267

The cheapest time to fly from St. Louis to Denver

February

Cheapest

Flights from $138

August

Most Expensive

Flights from $960

Jan

Feb

Jul

Aug

Sep

Oct

Nov

Dec