St. Louis (STL) → Denver (DEN)
About St. Louis to Denver Flights
Discover the best flights from St. Louis to Denver, covering 1,236 km in approximately 2h 3m. St. Louis (STL) to Denver (DEN) is one of the busy short-haul routes within United States. With 4 major airlines operating this route including direct flights, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from St. Louis to Denver.
12-Month Price History
Flight prices from St. Louis to Denver vary significantly throughout the year. February typically offers the best deals with average prices around $203, while July sees the highest prices, averaging $342. Savvy travelers can save up to 41% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
52 days
For best prices
Booking Tips
For the best prices on St. Louis to Denver flights, we recommend booking 45 days in advance. Domestic flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
Frontier Airlines F9 | $270 | - | - |
Southwest Airlines WN | $280 | - | - |
United Airlines UA | $360 | $1330 | $1760 |
SkyWest Airlines OO | $420 | $1390 | $2050 |
Frontier Airlines
F9
Economy
$270
Business
-
First
-
Southwest Airlines
WN
Economy
$280
Business
-
First
-
United Airlines
UA
Economy
$360
Business
$1330
First
$1760
SkyWest Airlines
OO
Economy
$420
Business
$1390
First
$2050
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
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Frequently Asked Questions
How long is the flight from St. Louis to Denver?
The flight time from St. Louis (STL) to Denver (DEN) is approximately 2 hours and 3 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between St. Louis and Denver?
The aerial distance between St. Louis and Denver is 1,236 kilometers (768 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from St. Louis to Denver?
Several airlines operate flights between St. Louis and Denver, including United Airlines, Southwest Airlines, Frontier Airlines and 1 more airlines. Direct flights are available on this route.
What is the cheapest month to fly from St. Louis to Denver?
Based on historical data, February typically offers the lowest airfares for flights from St. Louis to Denver. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Denver?
For the best prices on St. Louis to Denver flights, we recommend booking 64 days in advance. Domestic flights can sometimes offer good last-minute deals, but advance booking is usually cheaper.
Do I need a visa to travel from St. Louis to Denver?
Visa requirements depend on your nationality and the purpose of your visit. Since this is a domestic flight, no visa is required for citizens.
What is the time difference between St. Louis and Denver?
St. Louis operates on America/Chicago time zone, while Denver is in the America/Denver time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.