Denver to St. Louis (DEN-STL): nonstop flights and who flies them

United Airlines and Frontier Airlines fly nonstop between Denver (DEN) and St. Louis (STL), roughly 35 times a week. With United Airlines running most of the schedule, the shape of a week is predictable, which makes an open premium seat on a given date easy to spot and quick to lose. United Airlines and Frontier Airlines fly the route nonstop in 2LNR's schedule data; the timetable and the reverse direction are below.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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35
Nonstop flights a week
768 mi
Nonstop distance
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Denver to St. Louis flight schedule

Scheduled nonstop departures for DEN to STL, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Denver (DEN) to St. Louis (STL)
Date Flight Airline Departs DEN Arrives STL Duration Aircraft
UA 652United Airlines09:3512:402h 5m319
UA 1639United Airlines13:2716:342h 7m320
F9 3302Frontier Airlines16:1219:172h 5m320
UA 1422United Airlines17:3220:382h 6m738
UA 4778United Airlines20:2523:402h 15mE7W
UA 652United Airlines09:3512:402h 5m319
UA 1639United Airlines13:2716:342h 7m320
F9 3302Frontier Airlines16:1219:152h 3m32N
UA 1422United Airlines17:3220:382h 6m738
UA 1297United Airlines20:2523:312h 6m319
UA 652United Airlines09:3512:402h 5m319
UA 1639United Airlines13:2716:342h 7m320
F9 3302Frontier Airlines16:1219:172h 5m32N
UA 1422United Airlines17:3220:382h 6m738
UA 4778United Airlines20:2523:402h 15mE7W
UA 652United Airlines09:3512:402h 5m319
UA 1639United Airlines13:2716:342h 7m320
F9 3302Frontier Airlines16:1219:172h 5m32N
UA 1422United Airlines17:3220:382h 6m738
UA 4778United Airlines20:2523:402h 15mE7W
F9 3302Frontier Airlines09:0012:072h 7m32N
UA 652United Airlines09:3512:402h 5m319
UA 1639United Airlines13:2716:342h 7m320
UA 1422United Airlines17:3220:382h 6m738
UA 1297United Airlines20:2523:312h 6m319
UA 652United Airlines09:3512:402h 5m320
UA 1639United Airlines13:2716:342h 7m320
F9 3302Frontier Airlines16:1219:172h 5m32N
UA 1422United Airlines17:3220:382h 6m738
UA 4778United Airlines20:2523:402h 15mE7W
UA 652United Airlines09:3512:402h 5m320
UA 1639United Airlines13:2716:342h 7m320
UA 1422United Airlines17:3220:382h 6m738
UA 4778United Airlines20:2523:402h 15mE7W

Showing all 34 scheduled DEN to STL departures across the next 7 days with service. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every DEN to STL date on the interactive map

The full DEN to STL nonstop schedule

United Airlines and Frontier Airlines fly the route nonstop in 2LNR's schedule data. This page carries the full DEN to STL nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below.

See real availability

Confirmed upgrade and award seats on each DEN to STL departure, checked against live inventory so you know what is open before you book.

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Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See DEN to STL on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Denver to St. Louis nonstop

Carriers operating DEN to STL nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See DEN to STL on the interactive map →

Frequently asked questions about DEN to STL

How far is St. Louis from Denver?
DEN to STL covers about 768 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from DEN to STL?
United Airlines and Frontier Airlines fly the route nonstop. None of them is a carrier 2LNR reads inventory for, so this page carries the DEN to STL schedule rather than a space claim.
How many flights a week are there from DEN to STL?
About 35 nonstop flights a week run between Denver and St. Louis in the current schedule, operated by United Airlines and Frontier Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from DEN to STL depart?
Scheduled DEN to STL nonstops in the next 7 days with service leave between 09:00 and 20:25, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Does 2LNR show upgrade or award space on DEN to STL?
Not on this route: none of United Airlines and Frontier Airlines is a carrier 2LNR reads inventory for. The page carries the full DEN to STL nonstop schedule and who flies each departure, and the reverse direction is linked below.

See the full DEN to STL nonstop schedule

Every scheduled departure on this route, with who flies it. On the routes 2LNR does read inventory for, upgrade and award space shows by date, the next 14 days free on every product and the full horizon on Pro.

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