Denver to St Louis

DENSTL

Fly from Denver to St Louis starting at USD 42 with Frontier Airlines.Best fare available on Sep 30, 2026.Limited seats. Better plans. Book before it's gone.

Denver to St Louis cheapest flights this week

3 Sept
Southwest Airlines
18:50DEN
21:00STL
DirectUSD 163VIEW DEAL
9 Sept
Frontier Airlines
16:12DEN
18:17STL
DirectUSD 142VIEW DEAL
30 Sept
Frontier Airlines
16:12DEN
18:17STL
DirectUSD 42VIEW DEAL
12 Oct
Frontier Airlines
16:12DEN
18:15STL
DirectUSD 61VIEW DEAL

Denver to St Louis monthly flight fare trend

Sep
from USD 42
Oct
from USD 61
Nov
No flights
Dec
No flights
Jan
No flights
Feb
No flights

Airport Details

Origin

Denver

Denver International Airport (DEN)

Denver, DEN
Zone

Denver

Elev

5431 ft

Destination

St Louis

St. Louis Lambert International Airport (STL)

St Louis, STL
Zone

Chicago

Elev

618 ft

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