$111 Cheap Frontier Airlines flights Chicago (ORD) to Ontario (ONT)

$111 Cheap Frontier Airlines flights Chicago (ORD) to Ontario (ONT)

Prices were available within the past 7 days and start at $111 for one-way flights and $210 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 28 - Wed, Jun 4

ORD

Chicago

ONT

Ontario

$210 Roundtrip, found 1 day ago

$210

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, May 28 from Chicago to Ontario, returning Wed, Jun 4, priced at $210 found 1 day ago

Wed, May 28 - Mon, Jun 2

ORD

Chicago

ONT

Ontario

$220 Roundtrip, found 1 day ago

$220

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, May 28 from Chicago to Ontario, returning Mon, Jun 2, priced at $220 found 1 day ago

Mon, May 26 - Wed, Jun 4

ORD

Chicago

ONT

Ontario

$261 Roundtrip, found 1 day ago

$261

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 26 from Chicago to Ontario, returning Wed, Jun 4, priced at $261 found 1 day ago

Mon, May 26 - Mon, Jun 2

ORD

Chicago

ONT

Ontario

$271 Roundtrip, found 1 day ago

$271

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, May 26 from Chicago to Ontario, returning Mon, Jun 2, priced at $271 found 1 day ago