Cheap flights from Colorado to St. Louis from $57
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to St. Louis departing on 6/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Colorado to St. Louis
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 St. Louis?
In general, May is the cheapest month to fly from Colorado to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $167. The month of January is another great option to travel to St. Louis, with average flight prices from Colorado averaging around $168.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $193. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $288. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Colorado in the morning is the least expensive time of day to depart. momondo users have found prices as low as $191 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $307 per ticket.
What is the cheapest Colorado to Lambert-St Louis flight route?
Fly from Denver Intl to Lambert-St Louis for the best Colorado - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from Colorado when booking 9 weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $200 when searching 9 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Colorado for as low as $144 on momondo.
What cabin class options are available on Colorado to Lambert-St Louis flights?
There are 4 cabin classes available to choose from on Colorado to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Colorado to Lambert-St Louis?
Frontier, Southwest, and American Airlines are the most popular carriers operating from Colorado to Lambert-St Louis
What airlines fly to St. Louis?
Frontier, United Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Colorado according to our data. Frontier is the first choice among our users, with 51% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from Colorado to St. Louis on average per day?
12 flights are operational daily from Colorado to St. Louis as of May 2025. The most popular departure time for this route is 1:00PM, with 38% of flights per day taking off at noon.
How many flights depart from Colorado to St. Louis on average per week?
As of May 2025, 90 flights take off from Colorado and land in St. Louis each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.
Cheap Colorado to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Colorado to St. Louis
When did momondo last update prices for flights from Colorado to Lambert-St Louis Airport?
Prices for flights from Colorado to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Colorado to Lambert-St Louis Airport?
As of May 2025, there are 4 operators available to choose from for flights from Colorado to Lambert-St Louis Airport.
How old do you have to be to fly from Colorado to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Colorado to St. Louis?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Colorado to St. Louis is Boeing 737-700 Passenger/BBJ1 (winglets) (15.30% of total bookings). The next most popular plane models are Boeing 737-800 Passenger/BBJ2 (winglets) (14.28%), Boeing 737 MAX 8 (14.14%), and Airbus A320-100/200 (12.80%).
Best airlines flying from Colorado to St. Louis
Compare and see reviews for airlines that fly from Colorado to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $45 | Free Cancellation | Rating 5.9 3,288 reviews | |||
| PriceFrom $149 | Free Cancellation | Rating 7.4 8,702 reviews | |||
| PriceFrom $176 | Free Cancellation | Rating 8.0 4,292 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.2 10,000 reviews |
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Colorado to St. Louis?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Colorado.
Can I find flights from Colorado to St. Louis with flexible booking policies on momondo?
Yes. All flights to St. Louis from Colorado on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Colorado to St. Louis?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Colorado.
I’m not ready to book a flight from Colorado to St. Louis right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Colorado to St. Louis 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.