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 $301 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 9 - Thu, Aug 14

ONT

Ontario

MDW

Chicago

$301 Roundtrip, found 11 hours ago

$301

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Ontario to Chicago, returning Thu, Aug 14, priced at $301 found 11 hours ago

Mon, Aug 4 - Thu, Aug 14

ONT

Ontario

MDW

Chicago

$321 Roundtrip, found 11 hours ago

$321

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Chicago, returning Thu, Aug 14, priced at $321 found 11 hours ago

Wed, Aug 6 - Sat, Aug 9

ONT

Ontario

MDW

Chicago

$352 Roundtrip, found 11 hours ago

$352

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Ontario to Chicago, returning Sat, Aug 9, priced at $352 found 11 hours ago

Mon, Aug 4 - Sat, Aug 9

ONT

Ontario

MDW

Chicago

$372 Roundtrip, found 11 hours ago

$372

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Chicago, returning Sat, Aug 9, priced at $372 found 11 hours ago

Mon, Aug 4 - Mon, Aug 11

ONT

Ontario

MDW

Chicago

$392 Roundtrip, found 11 hours ago

$392

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Chicago, returning Mon, Aug 11, priced at $392 found 11 hours ago

Sat, Aug 9 - Sun, Aug 10

ONT

Ontario

MDW

Chicago

$422 Roundtrip, found 11 hours ago

$422

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Ontario to Chicago, returning Sun, Aug 10, priced at $422 found 11 hours ago

Mon, Aug 4 - Sun, Aug 10

ONT

Ontario

MDW

Chicago

$442 Roundtrip, found 11 hours ago

$442

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Ontario to Chicago, returning Sun, Aug 10, priced at $442 found 11 hours ago