St Louis to Denver
STLDEN
Fly from St Louis to Denver starting at USD 55 with Frontier Airlines.
Best fare available on Oct 21, 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
Sep
from USD 133
Oct
from USD 55
Nov
No flights
Dec
No flights
Jan
No flights
Feb
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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