Cheap Frontier Airlines flights Ontario (ONT) to Chicago (ORD)

Cheap Frontier Airlines flights Ontario (ONT) to Chicago (ORD)

Prices were available within the past 7 days and start at for one-way flights and $312 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jun 9 - Sun, Jun 15

ONT

Ontario

ORD

Chicago

$312 Roundtrip, found 16 hours ago

$312

Roundtrip

found 16 hours ago

Select Frontier Airlines flight, departing Mon, Jun 9 from Ontario to Chicago, returning Sun, Jun 15, priced at $312 found 16 hours ago