$44 Find Cheap Flights from Denver to St. Louis - Compare and Save

Yes, direct flights exist between Denver International Airport and Lambert St. Louis Airport. Multiple carriers, like Southwest Airlines and United Airlines, provide direct flights from DEN to Lambert Airport if you want to reach your destination quickly.

Yes, there is public transportation from Lambert St Louis to downtown. There are multiple options such as train, bus, or even taxi. Services run daily and leave every 20min. The travel time is roughly 30min.

Yes, there are quite a few hotel alternatives at and in close proximity to Lambert International Airport in St. Louis, including Hampton Inn St. Louis Airport and the Comfort Inn & Suites St. Louis-Hazelwood.

STL Airport has a free 24h Terminal Shuttle that operates between Exit 12 at both terminals. There is currently no way to walk between terminals. Terminal 1 and Terminal 2 are less than one mile apart, thus the shuttle trip duration is roughly 10min. Every 8 to 15min, shuttles are scheduled to pick up passengers.

Among airlines operating Denver to St. Louis flights:

• Frontier: offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

3 airlines operate flights between Denver and St. Louis. The airlines offering nonstop flights on this route include:

• Southwest
• United Airlines
• Frontier

Flights from Denver to St. Louis usually depart from Denver Intl (DEN) and arrive at Lambert-St Louis (STL).

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy Class
• Frontier: a cabin bag in Economy Class class
• Southwest: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Two cabin classes are available on flights from Denver to St. Louis:

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $211 round-trip via Las Vegas Harry Reid Intl (LAS), compared to $288 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest and United Airlines. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

Connecting flights from Denver to St. Louis most commonly pass through:

• Las Vegas Harry Reid Intl (LAS) - 70% of one-stop connections
• Orlando (MCO) - 30% of one-stop connections
Together, these airports account for 100% of one-stop bookings on this route.

On the Denver to St. Louis route, being flexible with your departure day can save you up to 29%. Saturday is the cheapest day at $229 round-trip on average, while Tuesday is the most expensive at $319: a $90 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Morning is the busiest departure period on Denver to St. Louis flights, with 40% of flights leaving in that window. Afternoon departures account for 30%, evening flights for 30%, and night flights for 0%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from Denver to St. Louis:

• Earliest: departs at 5:50 am and lands at 7:53 am
• Latest: departs at 10:05 pm and lands at 12:08 am.

The flight takes about 2h 03m.

Last-minute fares on this route - booked within 2 weeks of departure - run 24% above the route average of $286. Book 16 weeks before departure for the lowest fares.

A nonstop flight from Denver to St. Louis takes 2h 03m, covering 767 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

One-way fares from Denver to St. Louis are currently lower than usual. Average one-way flight prices are about $79, which is 55% below the typical average for this route.

Flying via Las Vegas Harry Reid Intl (LAS) gives the shortest average 1-stop total travel time at 9h 35m, compared with 16h 08m via Orlando (MCO).

St. Louis is 1 hour ahead of Denver (Central Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Denver to St. Louis range from $197 to $371, with an average of $286 over the past 12 months. Anything below $197 counts as a good deal.

JetBlue is the only airline on the Denver to St. Louis route offering in-flight Wi-Fi. Pricing depends on fare class.