$84 Cheap Frontier Airlines flights Ontario (ONT) to Chicago (ORD)

$84 Cheap Frontier Airlines flights Ontario (ONT) to Chicago (ORD)

Prices were available within the past 7 days and start at $84 for one-way flights and $168 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Oct 12 - Thu, Oct 23

ONT

Ontario

ORD

Chicago

$168 Roundtrip, found 14 hours ago

$168

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, Oct 12 from Ontario to Chicago, returning Thu, Oct 23, priced at $168 found 14 hours ago

Thu, Oct 16 - Thu, Oct 23

ONT

Ontario

ORD

Chicago

$182 Roundtrip, found 14 hours ago

$182

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, Oct 16 from Ontario to Chicago, returning Thu, Oct 23, priced at $182 found 14 hours ago

Thu, Oct 16 - Sun, Oct 19

ONT

Ontario

ORD

Chicago

$196 Roundtrip, found 14 hours ago

$196

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, Oct 16 from Ontario to Chicago, returning Sun, Oct 19, priced at $196 found 14 hours ago

Sun, Oct 12 - Thu, Oct 16

ONT

Ontario

ORD

Chicago

$204 Roundtrip, found 14 hours ago

$204

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, Oct 12 from Ontario to Chicago, returning Thu, Oct 16, priced at $204 found 14 hours ago

Fri, Oct 17 - Thu, Oct 23

ONT

Ontario

ORD

Chicago

$218 Roundtrip, found 14 hours ago

$218

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Fri, Oct 17 from Ontario to Chicago, returning Thu, Oct 23, priced at $218 found 14 hours ago

Thu, Nov 6 - Mon, Nov 10

ONT

Ontario

ORD

Chicago

$228 Roundtrip, found 2 days ago

$228

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Nov 6 from Ontario to Chicago, returning Mon, Nov 10, priced at $228 found 2 days ago

Fri, Oct 17 - Sun, Oct 19

ONT

Ontario

ORD

Chicago

$232 Roundtrip, found 14 hours ago

$232

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Fri, Oct 17 from Ontario to Chicago, returning Sun, Oct 19, priced at $232 found 14 hours ago

Mon, Oct 13 - Thu, Oct 23

ONT

Ontario

ORD

Chicago

$233 Roundtrip, found 14 hours ago

$233

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Mon, Oct 13 from Ontario to Chicago, returning Thu, Oct 23, priced at $233 found 14 hours ago

Mon, Oct 13 - Sun, Oct 19

ONT

Ontario

ORD

Chicago

$247 Roundtrip, found 14 hours ago

$247

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Mon, Oct 13 from Ontario to Chicago, returning Sun, Oct 19, priced at $247 found 14 hours ago

Mon, Oct 13 - Thu, Oct 16

ONT

Ontario

ORD

Chicago

$269 Roundtrip, found 14 hours ago

$269

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Mon, Oct 13 from Ontario to Chicago, returning Thu, Oct 16, priced at $269 found 14 hours ago