Cheap flights from St. Louis to Denver (STL - DEN)
The best prices from Lambert-St Louis to Denver Intl are usually found in September or October, booked 60 days in advance, depart on a Tuesday or Friday and return on a Wednesday
How to find the cheapest flight from St. Louis to Denver
All the information you need to plan the best STL to DEN flight in 2022: compare St. Louis to Denver flight prices with the expected peak season, weather and rainfall in Denver.
STL - DEN Price | $127 - $218 |
|---|---|
DEN Temperature | 30.2 - 73.4 °F |
DEN Rainfall | 0.5 - 2.3 inches |
| Popular in | December | High demand for flights, 26% potential price rise |
|---|---|---|
| Cheapest in | September | Best time to find cheap flights, 21% potential price drop |
| Average price | $159 | Average for round-trip flights in May 2022 |
| Round-trip from | $127 | From Lambert-St Louis to Denver Intl |
What is the cheapest day to fly round-trip from St. Louis to Denver?
Saturday flights are generally found to be more expensive for flights from St. Louis to Denver. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Denver.
How far in advance should I book a flight from St. Louis to Denver?
Find a great deal and save up to 14% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Denver within the next two weeks, with the cheapest ticket starting at $142.
What is the cheapest month to fly from St. Louis to Denver?
September can be a great time to fly to Denver from St. Louis with a flight ticket averaging about $160. Cheapflights users have found deals in the month of September for as cheap as $82. The most expensive prices can be found in the month of December.
When is the cheapest time to fly from St. Louis to Denver (STL - DEN)?
It’s optimal to fly from St. Louis to Denver in the evening. By choosing this option you can save up to 36% on the cost of your flight, compared to a flight at noon.
Cheap flights from St. Louis to Denver in May, June 2022
The best prices found for STL to DEN flights for May, June
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
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2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
St. Louis to Denver 2022 flight deals
Cheap flights to Denver from St. Louis found for this year
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
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2h 05mFrontier
Cheap Frontier flights from St. Louis to Denver
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 28mDenver Intl
Lambert-St Louis
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2h 10mFrontier
Non-stop flights to Denver from St. Louis
Save time with St. Louis to Denver direct flight deals
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 28mDenver Intl
Lambert-St Louis
Nonstop
2h 10mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 28mDenver Intl
Lambert-St Louis
Nonstop
2h 09mFrontier
Last minute flights from St. Louis to Denver
Late deals on return flights to Denver from St. Louis, departing today and this week
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mFrontier
Lambert-St Louis
Denver Intl
1 stop
8h 22mDenver Intl
Lambert-St Louis
Nonstop
2h 05mMultiple Airlines
One-way flights to Denver Intl from St. Louis
The cheapest one-way flights from St. Louis to Denver
Lambert-St Louis
Denver Intl
Nonstop
2h 25mFrontier
Lambert-St Louis
Denver Intl
Nonstop
2h 22mFrontier
Lambert-St Louis
Denver Intl
1 stop
12h 41mMultiple Airlines
Related info for your journey
Useful info, stats and facts about St. Louis to Denver flights.
What airports do I use to fly from St. Louis to Denver?
You will need to book a flight from Lambert-St Louis to Denver Intl if you want to fly from St. Louis to Denver. At least 9 different airlines have flights from Lambert-St Louis (STL) to Denver Intl (DEN) on a regular basis. There are 15 flights to Denver from the St. Louis airport per day. If you manage to book one that is nonstop, then you can expect the flight time from STL to DEN to be around 2h 17m.
Which airlines flying from Lambert-St Louis to Denver Intl have flexible cancellations due to COVID-19?
Some of the carriers operating flights from Lambert-St Louis to Denver Intl that may be offering flexible cancellation policies are Frontier, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.
Can I find flights from St. Louis to Denver for under $200 on Cheapflights?
Yes, there are multiple flights from St. Louis to Denver for under $200. The cheapest flight booked recently is on Frontier for just $180, but on average you can expect to pay $222.
Are there nonstop flights from St. Louis to Denver for under $200 on Cheapflights?
Cheapflights has at least 20 direct flights from St. Louis to Denver under $200. A good price for a nonstop flight from St. Louis to Denver is less than $226.
Are there last-minute flights available from St. Louis to Denver for under $200?
There are currently 20+ open flights from St. Louis to Denver within the next 7 days for less than $200.
What days are nonstop flights available from St. Louis to Denver?
Days when nonstop flights are available for this flight are: Friday, Saturday.
How popular is this St. Louis to Denver flight route?
Flights from Lambert-St Louis to Denver Intl have been viewed 52 times in the past calendar month.
How many flights depart from St. Louis to Denver on average per day?
2 flight departures from St. Louis to Denver per day on average.
Afternoon (Noon - 6pm) - 100% of flight departures
How long is the flight from St. Louis to Denver?
Departing from St. Louis to Denver will take you 2h 22m. Airlines will cover a distance of 772 mi. Generally, flights for this route are nonstop.
What is the cheapest airline to fly from St. Louis to Denver round-trip?
Frontier, at $180, was found to be the cheapest airline from St. Louis to Denver..
What are the cheapest airlines to fly from St. Louis to Denver one-way?
One-way options have recently been found by users for as low as $87 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $131 and United Airlines from $133 one-way.
What are the most popular airlines that fly from St. Louis to Denver?
When booking a flight from St. Louis to Denver, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.
What are the most reliable airlines from St. Louis to Denver?
No one likes to see their flight delayed. When booking a flight from St. Louis to Denver consider choosing SkyWest Airlines (93%), United Airlines (90%) or Air Canada (86%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from St. Louis to Denver?
Looking for the cheapest flight from St. Louis to Denver? While on average our users pay $535, our data indicates the cheapest price to be $56. The most popular route (Lambert-St Louis - Denver Intl), is priced around $230.
Other flights from St. Louis
Flights to Denver from St. Louis
Can I fly to Denver Intl from Lambert-St Louis right now?
Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter Denver Intl.
COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Denver Intl.
Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Denver Intl.
Can I fly back to Lambert-St Louis from Denver Intl?
COVID-19 testing requirements
Visitors from Denver Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Lambert-St Louis.
Quarantine requirements
Visitors from Denver Intl are not required to quarantine after entering Lambert-St Louis.
Alternative routes for St. Louis to Denver
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from St. Louis to Denver
The chart below displays the airlines Cheapflights users traveling from St. Louis to Denver choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Hourly flight availability from St. Louis to Denver
See what time of day planes typically take off from St. Louis to Denver
| 6%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 55%of flight departures | Morning6 am to noon |
| 29%of flight departures | AfternoonNoon to 6 pm |
| 10%of flight departures | Evening6 pm to midnight |
Weekly flight availability from St. Louis to Denver
See how many times per day planes take to the skies headed from St. Louis to Denver
| Sunday | 14daily flights |
|---|---|
| Monday | 18daily flights |
| Tuesday | 17daily flights |
| Wednesday | 17daily flights |
| Thursday | 16daily flights |
| Friday | 17daily flights |
| Saturday | 6daily flights |