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 $243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Dec 30 - Thu, Jan 15

ONT

Ontario

MDW

Chicago

$243 Roundtrip, found 12 hours ago

$243

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Ontario to Chicago, returning Thu, Jan 15, priced at $243 found 12 hours ago

Sun, Dec 21 - Fri, Jan 9

ONT

Ontario

MDW

Chicago

$252 Roundtrip, found 12 hours ago

$252

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Chicago, returning Fri, Jan 9, priced at $252 found 12 hours ago

Tue, Dec 30 - Mon, Jan 19

ONT

Ontario

MDW

Chicago

$262 Roundtrip, found 12 hours ago

$262

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Ontario to Chicago, returning Mon, Jan 19, priced at $262 found 12 hours ago

Tue, Dec 30 - Fri, Jan 9

ONT

Ontario

MDW

Chicago

$278 Roundtrip, found 12 hours ago

$278

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Ontario to Chicago, returning Fri, Jan 9, priced at $278 found 12 hours ago

Sun, Dec 21 - Tue, Dec 30

ONT

Ontario

MDW

Chicago

$288 Roundtrip, found 12 hours ago

$288

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Chicago, returning Tue, Dec 30, priced at $288 found 12 hours ago

Tue, Dec 23 - Fri, Jan 9

ONT

Ontario

MDW

Chicago

$298 Roundtrip, found 12 hours ago

$298

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Fri, Jan 9, priced at $298 found 12 hours ago

Sun, Dec 21 - Sun, Jan 4

ONT

Ontario

MDW

Chicago

$302 Roundtrip, found 12 hours ago

$302

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Chicago, returning Sun, Jan 4, priced at $302 found 12 hours ago

Tue, Dec 30 - Fri, Jan 16

ONT

Ontario

MDW

Chicago

$312 Roundtrip, found 12 hours ago

$312

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Ontario to Chicago, returning Fri, Jan 16, priced at $312 found 12 hours ago

Sun, Dec 21 - Wed, Dec 31

ONT

Ontario

MDW

Chicago

$317 Roundtrip, found 1 day ago

$317

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Dec 21 from Ontario to Chicago, returning Wed, Dec 31, priced at $317 found 1 day ago

Tue, Dec 30 - Sun, Jan 4

ONT

Ontario

MDW

Chicago

$328 Roundtrip, found 12 hours ago

$328

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 30 from Ontario to Chicago, returning Sun, Jan 4, priced at $328 found 12 hours ago

Tue, Dec 23 - Tue, Dec 30

ONT

Ontario

MDW

Chicago

$334 Roundtrip, found 12 hours ago

$334

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Tue, Dec 30, priced at $334 found 12 hours ago

Tue, Dec 23 - Sun, Jan 4

ONT

Ontario

MDW

Chicago

$348 Roundtrip, found 12 hours ago

$348

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Dec 23 from Ontario to Chicago, returning Sun, Jan 4, priced at $348 found 12 hours ago