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ORD
Chicago
STL
Saint Louis
Chicago → Saint Louis
Frontier Airlines · Round Trip · Nonstop
Save $187 (37% off)
Compared to the typical price of $512
$398$512
per person · round trip
Flight Details
Cabin
Economy
Departs
Apr 5, 2026
Returns
Apr 7, 2026
Price History
Avg: $321
Low: $241
High: $398
Mar 27Mar 29
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