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Cheap Flights from St. Louis to Denver $42.6

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Cheapest Flights from St. Louis to Denver (STL to DEN)

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from St. Louis to Denver (STL to DEN)

Question : Which airline has been on time to Denver International Airport (DEN) from Lambert-St. Louis International Airport (STL) the most?
Answer : The current leader is Republic Airlines with a 100% on-time rate. Stick to Republic Airlines and you won't spend more time in airports than you have to. Hopefully they keep that perfect record alive.

Question : Looking for the cheapest flight over the next 30 days?
Answer : As of November 28th, the best day for deals to Denver (DEN) from Saint Louis (STL) is December 9th. Bookings have been made roughly 52% below the average price for this route.

Question : Looking for the fastest flight from STL to DEN?
Answer : Southwest Airlines can get you there in 10 minutes. So, if you were to leave Saint Louis at 1:30 PM, you would arrive in Denver at 2:40 PM MST (remember, there is a one-hour time change to make sure you're on time for all your appointments).

Question : If your plans are flexible, have you considered changing your departure day?
Answer : The best day to fly on a budget this month is Monday. Being flexible with your travel days garners you even more savings during your booking.