Cheap Flights from Denver (DEN) to St. Louis (SUS)

Popular airlines from Denver Intl. Airport (DEN) to St. Louis, MO (SUS-Spirit of St. Louis)

Find available prices by choosing your travel dates.

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Spirit of St. Louis Airport (SUS) cost?
Discover the latest flight deals from DEN to SUS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from DEN to SUS?
The cheapest flights from DEN to SUS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from DEN to SUS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from DEN to SUS. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Denver Intl. Airport (DEN) to Spirit of St. Louis Airport (SUS)?
Nonstop flights from Denver Intl. Airport (DEN) to Spirit of St. Louis Airport (SUS) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel dates and click on either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from DEN to SUS?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change depending on various factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Denver Intl. Airport (DEN) to Spirit of St. Louis Airport (SUS)?
To touch down at Spirit of St. Louis Airport (SUS) on schedule, select a flight that leaves Denver Intl. Airport (DEN) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for St. Louis from Denver Intl. Airport (DEN)?
Explore your flight options from Denver Intl. Airport (DEN) to Lambert-St. Louis Intl. Airport (STL). This is the only airport in St. Louis you can touch down at if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Spirit of St. Louis Airport (SUS) last-minute?
Booking your ticket from DEN to SUS right before your trip is usually more expensive. But if there’s some wiggle room with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a DEN to SUS flight and hotel package?
Compared with arranging flights and hotels separately, booking a DEN to SUS flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and select from our wide range of hotels, then tailor your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Spirit of St. Louis Airport (SUS)?
In most instances, you can modify or cancel your DEN to SUS flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline’s fees and policies on flight changes, or if you want more information, head to our Customer Service portal.
*Available to One Key members.