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

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

Prices were available within the past 7 days and start at for one-way flights and $373 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Dec 21 - Wed, Dec 24

ONT

Ontario

MDW

Chicago

$373 Roundtrip, found 6 days ago

$373

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Chicago, returning Wed, Dec 24, priced at $373 found 6 days ago

Sun, Dec 14 - Tue, Dec 23

ONT

Ontario

MDW

Chicago

$457 Roundtrip, found 4 days ago

$457

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Dec 14 from Ontario to Chicago, returning Tue, Dec 23, priced at $457 found 4 days ago

Tue, Dec 23 - Tue, Dec 30

ONT

Ontario

MDW

Chicago

$502 Roundtrip, found 1 day ago

$502

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Tue, Dec 30, priced at $502 found 1 day ago

Sun, Dec 21 - Sat, Dec 27

ONT

Ontario

MDW

Chicago

$602 Roundtrip, found 6 days ago

$602

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Chicago, returning Sat, Dec 27, priced at $602 found 6 days ago

Tue, Dec 23 - Wed, Dec 31

ONT

Ontario

MDW

Chicago

$671 Roundtrip, found 1 day ago

$671

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Wed, Dec 31, priced at $671 found 1 day ago

Tue, Dec 23 - Sun, Dec 28

ONT

Ontario

MDW

Chicago

$691 Roundtrip, found 1 day ago

$691

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Sun, Dec 28, priced at $691 found 1 day ago

Tue, Dec 23 - Sat, Dec 27

ONT

Ontario

MDW

Chicago

$731 Roundtrip, found 6 days ago

$731

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Sat, Dec 27, priced at $731 found 6 days ago

Sun, Dec 28 - Tue, Dec 30

ONT

Ontario

MDW

Chicago

$741 Roundtrip, found 1 day ago

$741

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Dec 28 from Ontario to Chicago, returning Tue, Dec 30, priced at $741 found 1 day ago