Flights from Chicago to Denver

Cheapest flights from Chicago

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 14 - Wed, Aug 27

ORD

O'Hare Intl.

DEN

Denver Intl.

$75 Roundtrip, found 11 hours ago

$75

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from O'Hare Intl. to Denver Intl., returning Wed, Aug 27, priced at $75 found 11 hours ago

Thu, Aug 28 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$84 Roundtrip, found 13 hours ago

$84

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Thu, Aug 28 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $84 found 13 hours ago

Thu, Aug 14 - Tue, Aug 26

ORD

O'Hare Intl.

DEN

Denver Intl.

$87 Roundtrip, found 11 hours ago

$87

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from O'Hare Intl. to Denver Intl., returning Tue, Aug 26, priced at $87 found 11 hours ago

Thu, Aug 14 - Mon, Aug 25

ORD

O'Hare Intl.

DEN

Denver Intl.

$92 Roundtrip, found 11 hours ago

$92

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from O'Hare Intl. to Denver Intl., returning Mon, Aug 25, priced at $92 found 11 hours ago

Tue, Aug 26 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$97 Roundtrip, found 16 hours ago

$97

Roundtrip

found 16 hours ago

Select Frontier Airlines flight, departing Tue, Aug 26 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $97 found 16 hours ago

Thu, Aug 14 - Mon, Aug 18

MDW

Midway Intl.

DEN

Denver Intl.

$97 Roundtrip, found 16 hours ago

$97

Roundtrip

found 16 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from Midway Intl. to Denver Intl., returning Mon, Aug 18, priced at $97 found 16 hours ago

Tue, Aug 26 - Wed, Sep 3

ORD

O'Hare Intl.

DEN

Denver Intl.

$99 Roundtrip, found 13 hours ago

$99

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Tue, Aug 26 from O'Hare Intl. to Denver Intl., returning Wed, Sep 3, priced at $99 found 13 hours ago

Tue, Aug 26 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$100 Roundtrip, found 13 hours ago

$100

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Tue, Aug 26 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $100 found 13 hours ago

Thu, Aug 14 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$104 Roundtrip, found 11 hours ago

$104

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $104 found 11 hours ago

Mon, Aug 25 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$105 Roundtrip, found 13 hours ago

$105

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Mon, Aug 25 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $105 found 13 hours ago

Sun, Aug 17 - Tue, Aug 26

ORD

O'Hare Intl.

DEN

Denver Intl.

$109 Roundtrip, found 11 hours ago

$109

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Sun, Aug 17 from O'Hare Intl. to Denver Intl., returning Tue, Aug 26, priced at $109 found 11 hours ago

Thu, Aug 14 - Sun, Aug 24

ORD

O'Hare Intl.

DEN

Denver Intl.

$114 Roundtrip, found 11 hours ago

$114

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from O'Hare Intl. to Denver Intl., returning Sun, Aug 24, priced at $114 found 11 hours ago

Mon, Sep 15 - Thu, Sep 18

ORD

O'Hare Intl.

DEN

Denver Intl.

$116 Roundtrip, found 3 days ago

$116

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Sep 15 from O'Hare Intl. to Denver Intl., returning Thu, Sep 18, priced at $116 found 3 days ago

Sat, Aug 30 - Wed, Sep 3

ORD

O'Hare Intl.

DEN

Denver Intl.

$117 Roundtrip, found 13 hours ago

$117

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Sat, Aug 30 from O'Hare Intl. to Denver Intl., returning Wed, Sep 3, priced at $117 found 13 hours ago

Thu, Aug 14 - Wed, Aug 27

ORD

O'Hare Intl.

DEN

Denver Intl.

$122 Roundtrip, found 11 hours ago

$122

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Thu, Aug 14 from O'Hare Intl. to Denver Intl., returning Wed, Aug 27, priced at $122 found 11 hours ago

Tue, Aug 26 - Sat, Sep 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$122 Roundtrip, found 13 hours ago

$122

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Tue, Aug 26 from O'Hare Intl. to Denver Intl., returning Sat, Sep 6, priced at $122 found 13 hours ago

Sun, Aug 17 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$126 Roundtrip, found 11 hours ago

$126

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Sun, Aug 17 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $126 found 11 hours ago

Tue, Aug 26 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$151 Roundtrip, found 16 hours ago

$151

Roundtrip

found 16 hours ago

Select American Airlines flight, departing Tue, Aug 26 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $151 found 16 hours ago

Tue, Aug 26 - Sat, Aug 30

ORD

O'Hare Intl.

DEN

Denver Intl.

$151 Roundtrip, found 16 hours ago

$151

Roundtrip

found 16 hours ago

Select United flight, departing Tue, Aug 26 from O'Hare Intl. to Denver Intl., returning Sat, Aug 30, priced at $151 found 16 hours ago

Sat, Sep 6 - Sat, Sep 13

ORD

O'Hare Intl.

DEN

Denver Intl.

$217 Roundtrip, found 4 days ago

$217

Roundtrip

found 4 days ago

Select Delta flight, departing Sat, Sep 6 from O'Hare Intl. to Denver Intl., returning Sat, Sep 13, priced at $217 found 4 days ago