St Louis to Denver

STLDEN

Fly from St Louis to Denver starting at USD 113 with Southwest Airlines.Best fare available on Sep 1, 2026.Limited seats. Better plans. Book before it's gone.

St Louis to Denver cheapest flights this week

17 Aug
United Airlines
16:40STL
19:10DEN
DirectUSD 154VIEW DEAL
21 Aug
Frontier Airlines
16:23STL
00:00DEN
1 StopUSD 169VIEW DEAL
22 Aug
Frontier Airlines
18:45STL
04:48DEN
1 StopUSD 175VIEW DEAL
1 Sept
Southwest Airlines
16:05STL
18:20DEN
DirectUSD 113VIEW DEAL
18 Sept
Frontier Airlines
20:10STL
22:49DEN
DirectUSD 133VIEW DEAL

St Louis to Denver monthly flight fare trend

Aug
from USD 154
Sep
from USD 113
Oct
No flights
Nov
No flights
Dec
No flights
Jan
No flights

Airport Details

Origin

St Louis

St. Louis Lambert International Airport (STL)

St Louis, STL
Zone

Chicago

Elev

618 ft

Destination

Denver

Denver International Airport (DEN)

Denver, DEN
Zone

Denver

Elev

5431 ft

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