Compare live prices for STL to DEN. Use the search panel
to change origin, destination, passengers, cabin and trip type instantly.
STL → DENApprox. 1235.51 km08 May 2026Live inventory
✈ Flight Search
Modify your route
From
To
Depart
Return
Adults
Children
Infants
Cabin
Trip Type
STL→DEN
Sort By
💰 Cheapest
⚡ Fastest
🕐 Earliest
🎚️ Filters
Stops Reset
0
0
0
Max Price Reset
Up to ₹5,00,000
Departure Time Reset
🌙 Night 12am–6am
🌅 Morning 6am–12pm
☀️ Afternoon 12pm–6pm
🌆 Evening 6pm–12am
Fare Type
Airlines All
Loading…
Select Fare
—
—
per person · incl. taxes
Stops Reset
0
0
0
Max Price Reset
Up to ₹5,00,000
Departure Time Reset
🌙 Night 12am–6am
🌅 Morning 6am–12pm
☀️ Afternoon 12pm–6pm
🌆 Evening 6pm–12am
Fare Type
Airlines All
Loading…
Showing 25
of 122
live flights
Frontier Airlines
F9-2017
21:18
05/08/2026
STL
St Louis Lambert International Airport
6h 7m
1 Stop
⏱ LAS · 1h 35mLAS Airport
03:25
05/09/2026
+1
DEN
Denver International Airport
₹6,982
per person
✕ Non-refundable🔥 Last 3 seats
Frontier Airlines
F9-2017
21:18
05/08/2026
STL
St Louis Lambert International Airport
12h 20m
1 Stop
⏱ LAS · 7h 36mLAS Airport
09:38
05/09/2026
+1
DEN
Denver International Airport
₹7,517
per person
✕ Non-refundable🔥 Last 3 seats
Frontier Airlines
F9-2017
21:18
05/08/2026
STL
St Louis Lambert International Airport
26h 51m
1 Stop
⏱ LAS · 22h 5mLAS Airport
00:09
05/10/2026
+2
DEN
Denver International Airport
₹7,517
per person
✕ Non-refundable🔥 Last 3 seats
Frontier Airlines
F9-2017
21:18
05/08/2026
STL
St Louis Lambert International Airport
20h 46m
1 Stop
⏱ LAS · 15h 55mLAS Airport
18:04
05/09/2026
+1
DEN
Denver International Airport
₹7,517
per person
✕ Non-refundable🔥 Last 3 seats
Frontier Airlines
F9-2636
16:19
05/08/2026
STL
St Louis Lambert International Airport
16h 5m
1 Stop
⏱ MCO · 10h 7mMCO Airport
08:24
05/09/2026
+1
DEN
Denver International Airport
₹9,514
per person
✕ Non-refundable🔥 Last 3 seats
Frontier Airlines
F9-2636
16:19
05/08/2026
STL
St Louis Lambert International Airport
6h 52m
1 Stop
⏱ MCO · 0h 40mMCO Airport
23:11
05/08/2026
DEN
Denver International Airport
₹10,837
per person
✕ Non-refundable
Frontier Airlines
F9-4567
20:08
05/08/2026
STL
St Louis Lambert International Airport
1h 33m
Non-stop
21:41
05/08/2026
DEN
Denver International Airport
₹12,157
per person
✕ Non-refundable🔥 Last 5 seats
Southwest Airlines
WN-4454
06:20
05/08/2026
STL
St Louis Lambert International Airport
1h 20m
Non-stop
07:40
05/08/2026
DEN
Denver International Airport
₹14,058
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-1688
17:15
05/08/2026
STL
St Louis Lambert International Airport
1h 20m
Non-stop
18:35
05/08/2026
DEN
Denver International Airport
₹14,058
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-4459
18:45
05/08/2026
STL
St Louis Lambert International Airport
1h 20m
Non-stop
20:05
05/08/2026
DEN
Denver International Airport
₹14,058
per person
✕ Non-refundable6 fare options
Southwest Airlines
WN-4460
21:40
05/08/2026
STL
St Louis Lambert International Airport
1h 20m
Non-stop
23:00
05/08/2026
DEN
Denver International Airport
₹14,058
per person
✕ Non-refundable6 fare options
Delta Air Lines
DL-2363
07:00
05/08/2026
STL
St Louis Lambert International Airport
4h 45m
1 Stop
⏱ SLC · 0h 59mSLC Airport
11:45
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-2455
14:27
05/08/2026
STL
St Louis Lambert International Airport
4h 48m
1 Stop
⏱ SLC · 1h 0mSLC Airport
19:15
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-2822
18:04
05/08/2026
STL
St Louis Lambert International Airport
4h 54m
1 Stop
⏱ DTW · 1h 10mDTW Airport
22:58
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-2868
10:19
05/08/2026
STL
St Louis Lambert International Airport
6h 55m
1 Stop
⏱ DTW · 3h 12mDTW Airport
17:14
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-1626
06:45
05/08/2026
STL
St Louis Lambert International Airport
7h 14m
1 Stop
⏱ DTW · 3h 31mDTW Airport
13:59
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-1485
17:20
05/08/2026
STL
St Louis Lambert International Airport
5h 19m
1 Stop
⏱ ATL · 1h 16mATL Airport
22:39
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-1393
19:01
05/08/2026
STL
St Louis Lambert International Airport
5h 32m
1 Stop
⏱ ATL · 1h 21mATL Airport
00:33
05/09/2026
+1
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-1571
09:15
05/08/2026
STL
St Louis Lambert International Airport
5h 50m
1 Stop
⏱ ATL · 1h 54mATL Airport
15:05
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-1536
07:05
05/08/2026
STL
St Louis Lambert International Airport
6h 59m
1 Stop
⏱ ATL · 3h 5mATL Airport
14:04
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable2 fare options
Delta Air Lines
DL-1597
06:21
05/08/2026
STL
St Louis Lambert International Airport
5h 51m
1 Stop
⏱ MSP · 3h 1mMSP Airport
12:12
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable
Delta Air Lines
DL-1605
17:36
05/08/2026
STL
St Louis Lambert International Airport
6h 5m
1 Stop
⏱ MSP · 3h 14mMSP Airport
23:41
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable
Delta Air Lines
DL-1102
13:27
05/08/2026
STL
St Louis Lambert International Airport
6h 34m
1 Stop
⏱ ATL · 2h 33mATL Airport
20:01
05/08/2026
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable
Delta Air Lines
DL-1485
17:20
05/08/2026
STL
St Louis Lambert International Airport
7h 13m
1 Stop
⏱ ATL · 3h 6mATL Airport
00:33
05/09/2026
+1
DEN
Denver International Airport
₹14,644
per person
✕ Non-refundable
Southwest Airlines
WN-2952
15:00
05/08/2026
STL
St Louis Lambert International Airport
1h 25m
Non-stop
16:25
05/08/2026
DEN
Denver International Airport
₹14,993
per person
✕ Non-refundable6 fare options
😕 No flights match your filters.
St. Louis (STL)
📍 St Louis Lambert International Airport
🌍 United States
🕐 GMT -6
📐 Latitude: 38.748697
📐 Longitude: -90.370003
Denver (DEN)
📍 Denver International Airport
🌍 United States
🕐 GMT -7
📐 Latitude: 39.861698150635
📐 Longitude: -104.672996521
✈ Distance: St. Louis,USA to Denver,USA — 1235.51 km
📅 Results on this page are loaded for 08 May 2026. Click View all flights for the complete live search.
St. Louis to Denver — what to expect when booking
The STL–DEN route is served by multiple carriers throughout the year.
Fares on this route can move quickly — a price available now may not be there 30 minutes later.
If your dates are flexible, try shifting your departure by a day or two using the date strip above.
Mid-week departures often show lower base fares compared to weekend starts on many routes.
The distance between St. Louis,USA and Denver,USA is approximately
1235.51 km.
Before you book
Compare nearby dates
The date strip above lets you scan nearby fares without restarting the search.
Open full search for more control
Route page shows a limited live set. Full search opens the complete inventory with fresh results.
Check fare details
Each result shows baggage, refundability and fare details before you proceed.
❓ Frequently asked questions — St. Louis to Denver flights
Generally yes — fares on most routes are most competitive around 4–6 weeks before departure. Booking earlier usually means better availability and a lower base fare when your dates are fixed.
The straight-line distance between St. Louis,USA (STL) and Denver,USA (DEN) is approximately 1235.51 km. Actual flying distance may vary slightly depending on routing.
Non-stop availability on this route varies by airline schedule and season. Use the filters below to quickly check whether direct options are available on your selected date.
Mid-week departures often show lower prices than weekend travel on many routes. Use the date strip above to compare nearby days quickly.