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

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

Prices were available within the past 7 days and start at for one-way flights and $302 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jan 4 - Fri, Jan 9

MDW

Chicago

ONT

Ontario

$302 Roundtrip, found 2 days ago

$302

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jan 4 from Chicago to Ontario, returning Fri, Jan 9, priced at $302 found 2 days ago

Tue, Dec 30 - Sun, Jan 4

MDW

Chicago

ONT

Ontario

$322 Roundtrip, found 3 days ago

$322

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Chicago to Ontario, returning Sun, Jan 4, priced at $322 found 3 days ago

Sat, Jan 3 - Fri, Jan 9

MDW

Chicago

ONT

Ontario

$387 Roundtrip, found 2 days ago

$387

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Jan 3 from Chicago to Ontario, returning Fri, Jan 9, priced at $387 found 2 days ago

Sat, Jan 3 - Sun, Jan 4

MDW

Chicago

ONT

Ontario

$482 Roundtrip, found 3 days ago

$482

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jan 3 from Chicago to Ontario, returning Sun, Jan 4, priced at $482 found 3 days ago