Denver (DEN) to St. Louis (STL) Flights from ₹9,856
Fares on this route currently start from ₹9,856. Compare live DEN to STL prices, non-stop and connecting flights, departure times and airline choices before booking. Use the search panel to change origin, destination, passengers, cabin and trip type instantly.
DEN → STLApprox. 1235.51 km04 Jun 2026Live inventory
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Showing 25
of 134
live flights
Frontier Airlines
F9-3302
16:15
06/04/2026
DEN
Denver International Airport
3h 8m
Non-stop
19:23
06/04/2026
STL
St Louis Lambert International Airport
₹9,856
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-4967
12:34
06/04/2026
DEN
Denver International Airport
7h 37m
1 Stop
⏱ LAS · 0h 59mLAS Airport
20:11
06/04/2026
STL
St Louis Lambert International Airport
₹10,861
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-1324
05:05
06/04/2026
DEN
Denver International Airport
9h 26m
1 Stop
⏱ DFW · 4h 29mDFW Airport
14:31
06/04/2026
STL
St Louis Lambert International Airport
₹11,319
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-4646
06:00
06/04/2026
DEN
Denver International Airport
17h 57m
1 Stop
⏱ MCO · 10h 35mMCO Airport
23:57
06/04/2026
STL
St Louis Lambert International Airport
₹11,320
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-4646
06:00
06/04/2026
DEN
Denver International Airport
28h 29m
1 Stop
⏱ MCO · 21h 2mMCO Airport
10:29
06/05/2026
+1
STL
St Louis Lambert International Airport
₹11,320
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-2015
06:10
06/04/2026
DEN
Denver International Airport
14h 1m
1 Stop
⏱ LAS · 7h 33mLAS Airport
20:11
06/04/2026
STL
St Louis Lambert International Airport
₹11,908
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-3294
06:30
06/04/2026
DEN
Denver International Airport
11h 3m
1 Stop
⏱ ATL · 5h 10mATL Airport
17:33
06/04/2026
STL
St Louis Lambert International Airport
₹11,951
per person
✕ Non-refundable🔥 Last 3 seats2 fare options
Frontier Airlines
F9-1450
23:54
06/04/2026
DEN
Denver International Airport
9h 1m
1 Stop
⏱ ATL · 3h 7mATL Airport
08:55
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,271
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-2520
23:56
06/04/2026
DEN
Denver International Airport
10h 33m
1 Stop
⏱ MCO · 3h 12mMCO Airport
10:29
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,271
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-2520
23:56
06/04/2026
DEN
Denver International Airport
24h 1m
1 Stop
⏱ MCO · 16h 45mMCO Airport
23:57
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,803
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-2285
19:01
06/04/2026
DEN
Denver International Airport
25h 10m
1 Stop
⏱ LAS · 18h 40mLAS Airport
20:11
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,803
per person
✕ Non-refundable2 fare options
Frontier Airlines
F9-777
22:29
06/04/2026
DEN
Denver International Airport
21h 42m
1 Stop
⏱ LAS · 15h 14mLAS Airport
20:11
06/05/2026
+1
STL
St Louis Lambert International Airport
₹13,803
per person
✕ Non-refundable2 fare options
Southwest Airlines
WN-1751
05:05
06/04/2026
DEN
Denver International Airport
3h 5m
Non-stop
08:10
06/04/2026
STL
St Louis Lambert International Airport
₹15,652
per person
✕ Non-refundable10 fare options
Southwest Airlines
WN-3317
20:45
06/04/2026
DEN
Denver International Airport
3h 10m
Non-stop
23:55
06/04/2026
STL
St Louis Lambert International Airport
₹15,652
per person
✕ Non-refundable10 fare options
Delta Air Lines
DL-1675
09:06
06/04/2026
DEN
Denver International Airport
5h 25m
1 Stop
⏱ MSP · 0h 50mMSP Airport
14:31
06/04/2026
STL
St Louis Lambert International Airport
₹16,550
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-1553
12:35
06/04/2026
DEN
Denver International Airport
6h 28m
1 Stop
⏱ SLC · 1h 0mSLC Airport
19:03
06/04/2026
STL
St Louis Lambert International Airport
₹16,550
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-341
05:45
06/04/2026
DEN
Denver International Airport
6h 35m
1 Stop
⏱ ATL · 0h 58mATL Airport
12:20
06/04/2026
STL
St Louis Lambert International Airport
₹16,550
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-564
16:41
06/04/2026
DEN
Denver International Airport
7h 18m
1 Stop
⏱ ATL · 1h 21mATL Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹16,550
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-1129
06:00
06/04/2026
DEN
Denver International Airport
8h 31m
1 Stop
⏱ MSP · 3h 52mMSP Airport
14:31
06/04/2026
STL
St Louis Lambert International Airport
₹16,550
per person
✕ Non-refundable7 fare options
Delta Air Lines
DL-1096
00:55
06/04/2026
DEN
Denver International Airport
8h 34m
1 Stop
⏱ DTW · 2h 58mDTW Airport
09:29
06/04/2026
STL
St Louis Lambert International Airport
₹16,550
per person
✕ Non-refundable7 fare options
Southwest Airlines
WN-1522
19:05
06/04/2026
DEN
Denver International Airport
5h 30m
1 Stop
⏱ DAL · 0h 45mDAL Airport
00:35
06/05/2026
+1
STL
St Louis Lambert International Airport
₹16,599
per person
✕ Non-refundable5 fare options
American Airlines
AA-1322
18:10
06/04/2026
DEN
Denver International Airport
5h 49m
1 Stop
⏱ DFW · 0h 51mDFW Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹16,641
per person
✓ Refundable12 fare options
American Airlines
AA-1832
16:25
06/04/2026
DEN
Denver International Airport
7h 34m
1 Stop
⏱ DFW · 2h 33mDFW Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹16,641
per person
✓ Refundable12 fare options
American Airlines
AA-420
15:11
06/04/2026
DEN
Denver International Airport
8h 48m
1 Stop
⏱ DFW · 3h 49mDFW Airport
23:59
06/04/2026
STL
St Louis Lambert International Airport
₹16,641
per person
✓ Refundable7 fare options
United Airlines
UA-214
20:45
06/04/2026
DEN
Denver International Airport
3h 12m
Non-stop
23:57
06/04/2026
STL
St Louis Lambert International Airport
₹16,656
per person
✕ Non-refundable9 fare options
😕 No flights match your filters.
Denver (DEN)
📍 Denver International Airport
🌍 United States
🕐 GMT -7
📐 Latitude: 39.861698150635
📐 Longitude: -104.672996521
St. Louis (STL)
📍 St Louis Lambert International Airport
🌍 United States
🕐 GMT -6
📐 Latitude: 38.748697
📐 Longitude: -90.370003
✈ Distance: Denver,USA to St. Louis,USA — 1235.51 km
📅 Results on this page are loaded for 04 Jun 2026. Click View all flights for the complete live search.
Denver to St. Louis — what to expect when booking
The DEN–STL 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 Denver,USA and St. Louis,USA is approximately
1235.51 km.
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❓ Frequently asked questions — Denver to St. Louis 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 Denver,USA (DEN) and St. Louis,USA (STL) 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.