St Louis to Denver
STLDEN
Fly from St Louis to Denver starting at USD 180 with Frontier Airlines.
Best fare available on Jun 5, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Denver cheapest flights this week
St Louis to Denver monthly flight fare trend
May
from USD 89
Jun
from USD 180
Jul
No flights
Aug
No flights
Sep
No flights
Oct
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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