St Louis to Denver

STLDEN

Fly from St Louis to Denver starting at SAR 418 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

4 Aug
Frontier Airlines
15:41STL
23:55DEN
1 StopSAR 629VIEW DEAL
1 Sept
Southwest Airlines
16:05STL
18:20DEN
DirectSAR 418VIEW DEAL
18 Sept
Frontier Airlines
20:10STL
22:49DEN
DirectSAR 492VIEW DEAL

St Louis to Denver monthly flight fare trend

Jul
No flights
Aug
from SAR 629
Sep
from SAR 418
Oct
No flights
Nov
No flights
Dec
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

Flights from St Louis

Flights from St Louis to AtlantaFlights from St Louis to AustinFlights from St Louis to BostonFlights from St Louis to CharlotteFlights from St Louis to DallasFlights from St Louis to DetroitFlights from St Louis to NewarkFlights from St Louis to Fort LauderdaleFlights from St Louis to HonoluluFlights from St Louis to Washington