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Home / Denver — St Louis

Cheap flights Denver — St Louis

1 279 km ~2h 5 flights found 2 airlines cheapest on Monday
How many travellers?
Adults
12+ years
1
Children
2–11 years
0
Infants
under 2
0
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December 2026
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January 2027
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Prices found for 0 of 90 days. Prices update as more travellers search. Click any date to search live.
Depart
—
Return
—
Route characteristics
Distance
1 279 km
Flight time
2h
Time difference
+1h
Cheapest day
Monday
Departure airports (1)
DEN Denver International Airport
Arrival airports (1)
STL Lambert-St. Louis International Airport
Airlines (2)
F9 Frontier Airlines WN Southwest Airlines
Agencies (1)
Farera
Airlines — cheapest prices 2
Frontier Airlines
Frontier Airlines
Low-cost 3 flights · 3 days
$206
Southwest Airlines
Southwest Airlines
Low-cost 2 flights · 2 days
$355
Where to buy tickets 1
Farera
5 tickets · 4 days
from $206
Airports

From — Denver (1)

  • DEN Denver International Airport

To — St Louis (1)

  • STL Lambert-St. Louis International Airport
Other destinations from Denver
Frequently asked questions about the route Denver — St Louis
How long is the flight from Denver to St Louis?
Approximate flight time — 2h. This is an average for a direct flight. With connections, the time may be longer.
What is the distance from Denver to St Louis?
The straight-line distance — 1 279 km.
What is the time difference between Denver and St Louis?
The difference — +1h.
From which airports does Denver operate flights?
From Denver: DEN (Denver International Airport).
To which airports in St Louis do flights arrive?
To St Louis: STL (Lambert-St. Louis International Airport).
Which airlines fly this route?
This route is served by 2 airlines: Frontier Airlines, Southwest Airlines.
Which day of the week is cheapest?
The cheapest day of the week — Monday.
When is the best time to buy tickets?
Optimal — 1–3 months before departure. Check the calendar above — it shows the best dates.
How do I book flights?
Click "View this ticket" on any flight card — you'll be redirected to the booking page with this specific ticket pre-selected.
About the route Denver — St Louis

Flights Denver — St Louis is a popular route. The straight-line distance is 1 279 km. Flight time 2h. Time difference +1h.

From Denver (DEN) flights depart from 1 airport: DEN. To St Louis (STL) — 1 arrival airport: STL.

2 airlines operate on this route: Frontier Airlines, Southwest Airlines.

Cheapest day to fly — Monday.

Other destinations in United States from Denver