St Louis to Denver Flight Route Information
| Travel Distance: | 768 Miles |
|---|---|
| Airlines Flying This Route: | Frontier Airlines, United Airlines, Southwest Airlines |
| Weekly Flights: | 92 |
| Avg. Flight Duration: | 02.38 Hours |
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11/23/2026 Find Cheap Flights from St Louis to Denver (STL to DEN)
STL - St Louis DEN - Denver 
Find Cheap Flights from St Louis to Denver (STL to DEN)
Fares Starting from $56
STL - St Louis DEN - Denver Great deal! This is the lowest price we've seen for this one way route in the last 12 hours. Prices may change and aren't guaranteed for all flights or dates. Click on the price to continue your search and check the latest available fare. Ref. id 202609~Ref:KhHrPHWSFkyrbD0iSrnuiA
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Cheap Flights from St Louis to Denver - Compare & Book Our Best Deals
With over 12 daily departures from St Louis to Denver, this route offers great flexibility for different travel plans. Browse one-way fares from $55.99, round-trip fares from $101.98, and other affordable options across different budgets. Compare flight choices, explore schedules, and book the best St Louis to Denver deals that fit your budget and travel preferences.
Top Airlines that fly from St Louis to Denver
Cheap Flight Deals from St Louis to Denver
STL St Louis Mon, Nov 23
DEN Denver
from $56
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STL St Louis Mon, Oct 19
DEN Denver
from $68
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STL St Louis Sat, Oct 17
DEN Denver
from $68
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STL St Louis Sat, Oct 24
DEN Denver
from $73
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STL St Louis Sat, Oct 31
DEN Denver
from $73
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STL St Louis Mon, Nov 2
DEN Denver
from $73
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STL St Louis Wed, Nov 18
DEN Denver
from $73
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STL St Louis Thu, Nov 19
DEN Denver
from $73
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STL St Louis Sat, Nov 21
DEN Denver
from $73
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STL St Louis Mon, Oct 26
DEN Denver
from $73
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*All fares above were last found on: Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions. 202609~Ref:KhHrPHWSFkyrbD0iSrnuiA
Insights about cheap flights from St Louis to Denver – Direct Flights, Duration & Best Travel Time
When it comes to booking cheap flights, having the right information at your fingertips can make all the difference. Dive into the insights for cheap flights from St Louis to Denver and enhance your travel experience!
Daily Flights
12
Cheapest Month
April
Avg. Flight Duration
02.38
Peak Season
September
Distance
768 miles
Direct Flights
371
When is the Cheapest Time to Book Flights from STL to DEN?
Explore data-powered insights and trends for flights from St Louis to Denver. Discover average fares, cheap months to fly, when to book, and plan smarter.
What’s the cheapest day of the week to fly from St Louis to Denver?‡
What is the cheapest month to fly from St Louis to Denver?‡
‡This information is based on historical data from the last 365 days.
Finding Affordable Flights from St Louis to Denver
- Plan Ahead - One of the keys to securing cheap flights from St Louis to Denver is to plan your trip well in advance. Airlines often offer lower prices for those who book tickets months ahead. Keep an eye on special promotions and sales events, which can yield significant savings.
- Flexibility is Key - Being flexible with your travel dates can also lead to substantial cost savings. Consider flying during off-peak seasons or on weekdays when prices tend to be lower.
- Set Price Alerts - To keep tabs on flight prices, consider setting up fare alerts. These alerts will notify you when fares from St Louis to Denver drop, giving you the opportunity to grab cheap deals.
- Consider Nearby Airports - If Denver has multiple airports, check the prices at each one. Sometimes, flying into a nearby airport and then taking a short train or bus ride to your destination can be a much cheaper option.
- Bundle and Save - Booking your flight and accommodation together as a package can often result in significant savings. CheapOair offers these bundled deals, so make sure to explore this option.
When should I book flights from STL to DEN? ‡
‡Got flexible travel dates? Use our flight data from the past year to discover ideal time to fly from St Louis to Denver. Find out which months and days typically offer lower fares and let CheapOair search for the best options.
CheapOair provides the predicted prices for one-way trips or round-trips with a duration of 7 days for domestic and 14 days for international trips based on historical data and available flight information. Graphs are estimates only. Prices are subject to change and can't be guaranteed until ticketed.
Estimated price for
Round-trip
‡Graphs are estimates only. Based on historical data and available flight information. Prices are subject to change and cannot be guaranteed until ticketed.
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Insights About Flying from St Louis to Denver
Which is the high season to travel from St Louis to Denver?
The month of September is considered the high season for flying from STL to DEN. Traveling during the high season can affect ticket prices and availability, making this data crucial for trip planning.
How many direct flights are available from STL to DEN?
There are a total of 371 direct flights from St Louis to Denver. For travelers seeking convenience and shorter travel times, this data is important when choosing flight options.
Which is the low season to travel from St Louis to Denver?
April is considered the low season for traveling from St Louis to Denver, Colorado. Travelers looking for cost-effective options and fewer crowds may consider traveling during this period.
How many daily flights are there between St Louis to Denver?
There are as many as 12 daily flights available for travelers between STL to DEN. This data offers flexibility in choosing departure times that best suit your schedule.
Which is the busiest day for passengers flying between St Louis to Denver?
Monday are the busiest days for passengers flying between St Louis to Denver. Knowing the peak travel day can help you plan your trip to avoid overcrowded flights or airports.
What percentage of travelers spent an average of 1 days in Denver, Colorado?
Approximately 42.03% of travelers spent an average of 1 days exploring Denver. This information can assist in planning the duration of your stay in Denver
What percentage of STL to DEN flyers traveled with kids under 14?
About 4% of passengers on flights from St Louis to Denver were accompanied by children under the age of 14. This information is useful if you're planning a family trip and want to know how common it is to travel with young children on this route.
What percentage of St Louis to Denver travelers were over 60 years old?
A notable 17% of travelers were aged 60 or older. This statistic provides insights for senior travelers or those seeking a mature travel demographic.
What percentage of STL to DEN travelers were millennials?
Millennials make up a significant portion of travelers on this route, accounting for 42% of all passengers. If you're a millennial looking to connect with like-minded travelers, this statistic might interest you.
What percentage of St Louis to Denver travelers were female?
Almost half of the passengers, approximately 50% were female. Knowing the gender distribution can be useful for solo female travelers or those interested in gender-related travel insights.
What percent of St Louis to Denver travellers booked first or business class?
7% of travelers booked first or business class on this route.
At what time the earliest flight departs from St Louis?
The earliest flight departs at 5:00AM - 6:00AM.
On which days one can have the most flight options in Denver?
Monday offer the most flight options in Denver.
§
All flight facts are based on last 3 months' data except the highest and lowest booking months that are based on last 3 months' data.
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Cheap Flights from St Louis to Denver
Flights from St. Louis to Denver
Looking for flights from St. Louis to Denver? Look no more, for you're at the right place. Book cheap flights from St. Louis to Denver on CheapOair and enjoy great discounts. Whether its leisure or a business trip, we offer the most competitive rates on flight tickets to destinations around the world. Grab STL to DEN flight deals, and save big!
Airports in St. Louis
The city of St. Louis in the US state of Missouri is served by 4 airports - St. Louis Lambert International Airport, MidAmerica St. Louis Airport, Creve Coeur Airport and Spirit of St. Louis Airport. The city is primarily served by St. Louis Lambert International Airport (also known as Lambert Field or Lambert Airport). It is located 14 miles away from downtown St. Louis. This airport is the state's largest and busiest airport with 270 daily departures to over 80 domestic and international destinations. Passengers can avail seamless connectivity between the airport and the city through a network of shuttle services, taxis, ride sharing services, light rail (MetroLink), bus service, Limousines and vans.
Explore Denver
Denver is the capital of Colorado and the largest city in the Rocky Mountains region of the United States. It is nicknamed 'The Mile-High City' because it is situated an altitude of exactly 1 mile between the Great Plains and the Rocky Mountains. The city is nearly equidistant from Chicago and St. Louis, and Los Angeles and San Francisco. While Denver is a prime destination for skiing, hiking, climbing, kayaking, and camping, it is an equally good place for those wishing to get a hang of local and national breweries. Beer lovers swarm the city each fall as it hosts the annual Great American Beer Festival.
Things to do in Denver
Great American Beer Festival
Started in 1982, the Great American Beer Festival is the largest ticketed beer festival in the United States. It is a three-day annual event from mid to late September or early October. It attracts beer lovers from all parts of the world for its sheer range and taste of different American craft beers.
Denver Millennium Bridge
The Denver Millennium Bridge is the world's first cable-stayed bridge that uses post-tensioned structural construction. It was built during 1999 and 2002 at a cost of USD 9 Million. It features a 200-foot white tapered steel mast that connects to the bridge deck and foundation anchors by steel cables.
Denver Mint
The Denver Mint is a branch of the United States Mint. It started operations on February 1, 1906 and had produced 167 million coins in the first year. It is still at work and produces coins for circulation, mint sets and commemorative coins. The coins minted here are stamped with a D mint mark.
Best Time to Fly to Denver
The best times to fly to Denver are the summer and autumn season. These seasons run from June to August and September to October respectively. Visitors to the city will be welcomed with cultural festivals like A Taste of Colorado, Oktoberfest on Larimer Square and The Great American Beer Festival during this time of the year.
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