Flights from Denver to Grayslake

Cheapest flights from Denver

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 7 - Wed, Aug 13

DEN

Denver Intl.

ORD

O'Hare Intl.

$80 Roundtrip, found 2 days ago

$80

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Aug 7 from Denver Intl. to O'Hare Intl., returning Wed, Aug 13, priced at $80 found 2 days ago

Tue, Sep 16 - Thu, Sep 18

DEN

Denver Intl.

ORD

O'Hare Intl.

$87 Roundtrip, found 1 day ago

$87

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 16 from Denver Intl. to O'Hare Intl., returning Thu, Sep 18, priced at $87 found 1 day ago

Thu, Sep 18 - Thu, Sep 25

DEN

Denver Intl.

ORD

O'Hare Intl.

$92 Roundtrip, found 2 days ago

$92

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Sep 18 from Denver Intl. to O'Hare Intl., returning Thu, Sep 25, priced at $92 found 2 days ago

Tue, Sep 16 - Tue, Sep 23

DEN

Denver Intl.

ORD

O'Hare Intl.

$97 Roundtrip, just found

$97

Roundtrip

just found

Select Frontier Airlines flight, departing Tue, Sep 16 from Denver Intl. to O'Hare Intl., returning Tue, Sep 23, priced at $97 just found

Thu, Sep 11 - Tue, Sep 16

DEN

Denver Intl.

ORD

O'Hare Intl.

$99 Roundtrip, found 1 day ago

$99

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Denver Intl. to O'Hare Intl., returning Tue, Sep 16, priced at $99 found 1 day ago

Mon, Sep 22 - Tue, Sep 23

DEN

Denver Intl.

ORD

O'Hare Intl.

$102 Roundtrip, just found

$102

Roundtrip

just found

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to O'Hare Intl., returning Tue, Sep 23, priced at $102 just found

Thu, Sep 11 - Thu, Sep 18

DEN

Denver Intl.

ORD

O'Hare Intl.

$104 Roundtrip, found 1 day ago

$104

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Denver Intl. to O'Hare Intl., returning Thu, Sep 18, priced at $104 found 1 day ago

Wed, Sep 24 - Mon, Sep 29

DEN

Denver Intl.

ORD

O'Hare Intl.

$105 Roundtrip, found 4 days ago

$105

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Sep 24 from Denver Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $105 found 4 days ago

Mon, Sep 22 - Thu, Sep 25

DEN

Denver Intl.

ORD

O'Hare Intl.

$107 Roundtrip, just found

$107

Roundtrip

just found

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to O'Hare Intl., returning Thu, Sep 25, priced at $107 just found

Tue, Sep 9 - Wed, Sep 17

DEN

Denver Intl.

ORD

O'Hare Intl.

$109 Roundtrip, found 12 hours ago

$109

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Sep 9 from Denver Intl. to O'Hare Intl., returning Wed, Sep 17, priced at $109 found 12 hours ago

Fri, Sep 12 - Tue, Sep 16

DEN

Denver Intl.

ORD

O'Hare Intl.

$109 Roundtrip, found 1 day ago

$109

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Sep 12 from Denver Intl. to O'Hare Intl., returning Tue, Sep 16, priced at $109 found 1 day ago

Wed, Sep 10 - Tue, Sep 16

DEN

Denver Intl.

ORD

O'Hare Intl.

$113 Roundtrip, found 1 day ago

$113

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Sep 10 from Denver Intl. to O'Hare Intl., returning Tue, Sep 16, priced at $113 found 1 day ago

Fri, Sep 12 - Thu, Sep 18

DEN

Denver Intl.

ORD

O'Hare Intl.

$114 Roundtrip, found 1 day ago

$114

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Sep 12 from Denver Intl. to O'Hare Intl., returning Thu, Sep 18, priced at $114 found 1 day ago

Thu, Sep 4 - Thu, Sep 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$116 Roundtrip, found 1 day ago

$116

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Denver Intl. to O'Hare Intl., returning Thu, Sep 11, priced at $116 found 1 day ago

Tue, Sep 9 - Sat, Sep 13

DEN

Denver Intl.

ORD

O'Hare Intl.

$120 Roundtrip, found 12 hours ago

$120

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Tue, Sep 9 from Denver Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $120 found 12 hours ago

Sat, Sep 20 - Tue, Sep 30

DEN

Denver Intl.

ORD

O'Hare Intl.

$122 Roundtrip, found 2 days ago

$122

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Sep 20 from Denver Intl. to O'Hare Intl., returning Tue, Sep 30, priced at $122 found 2 days ago

Sat, Sep 6 - Thu, Sep 18

DEN

Denver Intl.

ORD

O'Hare Intl.

$126 Roundtrip, found 12 hours ago

$126

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Sat, Sep 6 from Denver Intl. to O'Hare Intl., returning Thu, Sep 18, priced at $126 found 12 hours ago

Thu, Sep 11 - Fri, Sep 19

DEN

Denver Intl.

ORD

O'Hare Intl.

$126 Roundtrip, found 1 day ago

$126

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Denver Intl. to O'Hare Intl., returning Fri, Sep 19, priced at $126 found 1 day ago

Wed, Sep 24 - Mon, Sep 29

DEN

Denver Intl.

ORD

O'Hare Intl.

$151 Roundtrip, found 4 days ago

$151

Roundtrip

found 4 days ago

Select American Airlines flight, departing Wed, Sep 24 from Denver Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $151 found 4 days ago

Wed, Sep 24 - Mon, Sep 29

DEN

Denver Intl.

ORD

O'Hare Intl.

$151 Roundtrip, found 4 days ago

$151

Roundtrip

found 4 days ago

Select United flight, departing Wed, Sep 24 from Denver Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $151 found 4 days ago