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Ontario California aerial with San Gabriel Mountains
ONT
Ontario
Chicago skyline and Lake Michigan
CHI
Chicago

Ontario → Chicago

Southwest Airlines · Round Trip · Nonstop

Save $40 (20% off)
Compared to the typical price of $205
$165$205

per person · round trip

Book This Deal

Flight Details

Cabin
Economy
Departs
May 20, 2026
Returns
May 25, 2026

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