$199 Cheap Frontier Airlines flights Ontario Intl. Airport (ONT) to Chicago (MDW)

$199 Cheap Frontier Airlines flights Ontario Intl. Airport (ONT) to Chicago (MDW)

Prices were available within the past 7 days and start at $199 for one-way flights and $260 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 11 - Thu, Aug 13

ONT

Ontario

MDW

Chicago

$260 Roundtrip, found 21 hours ago

$260

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Aug 11 from Ontario to Chicago, returning Thu, Aug 13, priced at $260 found 21 hours ago

Mon, Aug 10 - Thu, Aug 13

ONT

Ontario

MDW

Chicago

$270 Roundtrip, found 21 hours ago

$270

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Mon, Aug 10 from Ontario to Chicago, returning Thu, Aug 13, priced at $270 found 21 hours ago

Sat, Aug 1 - Fri, Aug 21

ONT

Ontario

MDW

Chicago

$284 Roundtrip, found 21 hours ago

$284

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Sat, Aug 1 from Ontario to Chicago, returning Fri, Aug 21, priced at $284 found 21 hours ago

Tue, Aug 4 - Thu, Aug 20

ONT

Ontario

MDW

Chicago

$285 Roundtrip, found 21 hours ago

$285

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Aug 4 from Ontario to Chicago, returning Thu, Aug 20, priced at $285 found 21 hours ago

Fri, Aug 7 - Thu, Aug 13

ONT

Ontario

MDW

Chicago

$294 Roundtrip, found 21 hours ago

$294

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Fri, Aug 7 from Ontario to Chicago, returning Thu, Aug 13, priced at $294 found 21 hours ago

Tue, Aug 4 - Fri, Aug 21

ONT

Ontario

MDW

Chicago

$309 Roundtrip, found 21 hours ago

$309

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Aug 4 from Ontario to Chicago, returning Fri, Aug 21, priced at $309 found 21 hours ago

Sat, Aug 15 - Sun, Aug 16

ONT

Ontario

MDW

Chicago

$312 Roundtrip, found 16 hours ago

$312

Roundtrip

found 16 hours ago

Select Frontier Airlines flight, departing Sat, Aug 15 from Ontario to Chicago, returning Sun, Aug 16, priced at $312 found 16 hours ago

Mon, Aug 3 - Fri, Aug 21

ONT

Ontario

MDW

Chicago

$318 Roundtrip, found 21 hours ago

$318

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Mon, Aug 3 from Ontario to Chicago, returning Fri, Aug 21, priced at $318 found 21 hours ago

Mon, Aug 10 - Sun, Aug 16

ONT

Ontario

MDW

Chicago

$322 Roundtrip, found 21 hours ago

$322

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Mon, Aug 10 from Ontario to Chicago, returning Sun, Aug 16, priced at $322 found 21 hours ago

Tue, Aug 4 - Sun, Aug 23

ONT

Ontario

MDW

Chicago

$337 Roundtrip, found 21 hours ago

$337

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Aug 4 from Ontario to Chicago, returning Sun, Aug 23, priced at $337 found 21 hours ago