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Cheap flights from St. Louis to Denver from R2 778

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Find the cheapest flights from St. Louis to Denver

Cheap return flights

These are some of the best return flight deals from St. Louis to Denver that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Denver.

Cheap last-minute flights

Planning a quick getaway from St. Louis to Denver? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Denver, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from St. Louis to Denver

Find recent return train or bus tickets from St. Louis to Denver.

All return flight deals from St. Louis to Denver

The cheapest plane tickets from St. Louis to Denver found on KAYAK recently.
STL-DEN
2h 32mdirect
DEN-STL
2h 05mdirect
Air Canada
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STL-DEN
2h 31mdirect
DEN-STL
2h 16mdirect
Frontier
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STL-DEN
2h 25mdirect
DEN-STL
2h 00mdirect
Southwest
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STL-DEN
2h 32mdirect
DEN-STL
2h 05mdirect
United Airlines
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STL-DEN
2h 32mdirect
Air Canada
Find Deal
STL-DEN
2h 31mdirect
Frontier
Find Deal
STL-DEN
2h 25mdirect
Southwest
Find Deal
STL-DEN
2h 32mdirect
United Airlines
Find Deal

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How to get the cheapest flight ticket from St. Louis to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from St. Louis is in April. Flight prices, which tend to average around R2 517, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in April, then you should wait until May to fly from St. Louis, when ticket prices are also cheap, with an average price of R2 722.

What is the cheapest day to depart on your flight to Denver?

On average, the least expensive day to fly to Denver from St. Louis is on a Monday. momondo users have found tickets for Monday departures for as low as R0. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to Denver on a Wednesday will generally be more expensive and average around R3 166. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Denver?

In the morning is the cheapest time of day to fly from St. Louis to Denver when you can find flight prices for as low as R0. Flying to Denver in the morning is an ideal time because this is during off-peak travel hours. In the evening is when there is more demand to fly to Denver, so prices are often more expensive at around R3 166 per ticket.

What is the cheapest Lambert-St Louis to Denver Intl flight route?

Fly from Lambert-St Louis to Denver Intl for the best Lambert-St Louis - Denver Intl flight prices

How far in advance should I book a flight to Denver?

You are more likely to see cheaper flights to Denver from St. Louis when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Denver for around R3 126 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from St. Louis for as low as R2 387 on momondo.

What cabin class options are available on Lambert-St Louis to Denver Intl flights?

There are 1 cabin classes available to choose from on Lambert-St Louis to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have St. Louis to Denver flight prices changed over time?

As of January 2025, prices for St. Louis to Denver flights are approximately 47% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Denver according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to Denver (STL to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Denver

Direct flights

None
There are no direct flights from St. Louis to Denver. There are no popular flight routes from St. Louis to Denver.

  • How far is Lambert-St Louis to Denver Intl by plane?

    A flight from Lambert-St Louis to Denver Intl will travel around 1278,1 km.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Denver Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Denver Intl Airport are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Denver Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Denver Intl Airport.

  • What documentation or ID do you need to fly to Denver Intl Airport?

    The travel and health documents required for your trip to Denver Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Denver Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from St. Louis to Denver?


Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Estes Park

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Denver?

Finding the right flight to Denver from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Denver quick and easy, saving you time and money.

Can I find flights from St. Louis to Denver with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Denver from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Denver?

momondo provides multiple filters to help you find the best flight to Denver from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Denver right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Denver flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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