St. Louis Gateway Arch
STL
Saint Louis
Denver skyline with Rocky Mountains
DEN
Denver

Saint Louis → Denver

Frontier Airlines · Round Trip · Nonstop

$168

per person · round trip

Book This Deal

Flight Details

Cabin
Economy
Departs
Apr 18, 2026
Returns
Apr 20, 2026

Price History

Avg: $173
Low: $163
High: $187
$150$167$183$200Mar 26Mar 29Apr 4

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