$131 Cheap Frontier Airlines flights Chicago (ORD) to Ontario Intl. Airport (ONT)

$131 Cheap Frontier Airlines flights Chicago (ORD) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at $131 for one-way flights and $250 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jul 29 - Tue, Aug 18

ORD

Chicago

ONT

Ontario

$250 Roundtrip, just found

$250

Roundtrip

just found

Select Frontier Airlines flight, departing Wed, Jul 29 from Chicago to Ontario, returning Tue, Aug 18, priced at $250 just found

Wed, Jul 29 - Tue, Aug 18

ORD

Chicago

ONT

Ontario

$264 Roundtrip, just found

$264

Roundtrip

just found

Select Frontier Airlines flight, departing Wed, Jul 29 from Chicago to Ontario, returning Tue, Aug 18, priced at $264 just found

Wed, Jul 8 - Wed, Jul 15

ORD

Chicago

ONT

Ontario

$280 Roundtrip, just found

$280

Roundtrip

just found

Select Frontier Airlines flight, departing Wed, Jul 8 from Chicago to Ontario, returning Wed, Jul 15, priced at $280 just found

Wed, Jul 29 - Tue, Aug 18

ORD

Chicago

ONT

Ontario

$294 Roundtrip, just found

$294

Roundtrip

just found

Select Frontier Airlines flight, departing Wed, Jul 29 from Chicago to Ontario, returning Tue, Aug 18, priced at $294 just found

Wed, Jul 29 - Sat, Aug 15

ORD

Chicago

ONT

Ontario

$299 Roundtrip, found 1 day ago

$299

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jul 29 from Chicago to Ontario, returning Sat, Aug 15, priced at $299 found 1 day ago

Tue, Jul 28 - Fri, Aug 14

ORD

Chicago

ONT

Ontario

$300 Roundtrip, found 4 days ago

$300

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Tue, Jul 28 from Chicago to Ontario, returning Fri, Aug 14, priced at $300 found 4 days ago