$94 Find Cheap Flights from St. Louis to Colorado - Compare and Save

The cheapest ticket to Colorado from St. Louis found in the last 5 days was to Denver, at $159 round-trip. The most popular route is from St. Louis (STL) to Denver (DEN), and the cheapest round-trip airline ticket found on this route in the last 5 days was $159.

The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $215 on average. Morning departures are around 17% more expensive than evening flights, on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is $441.

No, with an average price for the route of $291, prices are generally cheapest when you fly direct.

The cheapest month for flights from St. Louis to Colorado is October, when tickets cost $201 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $356 and $354 respectively.

If your flying dates are flexible, you should consider flying to Colorado on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from St. Louis to Colorado. For your return ticket, we recommend flying on a Saturday and avoiding Mondays for the best deals.

To get a below average price on the flight from St. Louis to Colorado, you should book around 2 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

There are 3 airlines that fly nonstop from St. Louis to Colorado. They are: Frontier, Southwest and United Airlines. The cheapest price of all airlines flying this route was found with Frontier at $56 for a round-trip flight to Denver (DEN). On average, Frontier offers the best prices for nonstop flights between St. Louis and Colorado.

St. Louis and Colorado are connected by different airlines. The airlines that fly that route the most regularly are Southwest (67 flights per week), Air Canada (29 flights per week), and United Airlines (29 flights per week).

The duration of a flight to Colorado depends on your arrival airport. The shortest routes to Colorado from St. Louis are to Denver, which takes 2h 15m, Colorado Springs, which takes 3h 50m, and Montrose, which takes 4h 25m.

There are 4 cabin class options for the route. These are First, Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

The earliest flight from St. Louis to Colorado departs at 5:10 am, landing in Denver at 6:32 am.

If you prefer to fly at night, the latest flight from St. Louis to Colorado jets off at 8:50 pm and lands in Denver at 10:05 pm.