Flights from Denver to Crystal Lake

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.

Fri, Jul 4 - Thu, Jul 10

DEN

Denver Intl.

ORD

O'Hare Intl.

$148 Roundtrip, found 1 day ago

$148

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 4 from Denver Intl. to O'Hare Intl., returning Thu, Jul 10, priced at $148 found 1 day ago

Fri, Jul 4 - Wed, Jul 9

DEN

Denver Intl.

ORD

O'Hare Intl.

$169 Roundtrip, found 1 day ago

$169

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 4 from Denver Intl. to O'Hare Intl., returning Wed, Jul 9, priced at $169 found 1 day ago

Tue, Jul 8 - Sun, Jul 13

DEN

Denver Intl.

ORD

O'Hare Intl.

$171 Roundtrip, found 3 days ago

$171

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Sun, Jul 13, priced at $171 found 3 days ago

Fri, Jul 4 - Tue, Jul 8

DEN

Denver Intl.

ORD

O'Hare Intl.

$182 Roundtrip, found 1 day ago

$182

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 4 from Denver Intl. to O'Hare Intl., returning Tue, Jul 8, priced at $182 found 1 day ago

Tue, Jul 8 - Thu, Jul 10

DEN

Denver Intl.

ORD

O'Hare Intl.

$184 Roundtrip, found 1 day ago

$184

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Thu, Jul 10, priced at $184 found 1 day ago

Mon, Jun 30 - Wed, Jul 9

DEN

Denver Intl.

ORD

O'Hare Intl.

$192 Roundtrip, found 4 hours ago

$192

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Mon, Jun 30 from Denver Intl. to O'Hare Intl., returning Wed, Jul 9, priced at $192 found 4 hours ago

Tue, Jul 8 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$194 Roundtrip, found 1 day ago

$194

Roundtrip

found 1 day ago

Select American Airlines flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $194 found 1 day ago

Tue, Jul 8 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$194 Roundtrip, found 1 day ago

$194

Roundtrip

found 1 day ago

Select United flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $194 found 1 day ago

Fri, Jul 4 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$197 Roundtrip, found 17 hours ago

$197

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Fri, Jul 4 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $197 found 17 hours ago

Thu, Jul 10 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$199 Roundtrip, found 17 hours ago

$199

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Thu, Jul 10 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $199 found 17 hours ago

Tue, Jul 8 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$204 Roundtrip, found 1 day ago

$204

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $204 found 1 day ago

Mon, Jun 30 - Tue, Jul 8

DEN

Denver Intl.

ORD

O'Hare Intl.

$205 Roundtrip, found 4 hours ago

$205

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Mon, Jun 30 from Denver Intl. to O'Hare Intl., returning Tue, Jul 8, priced at $205 found 4 hours ago

Thu, Jun 19 - Sat, Jun 21

DEN

Denver Intl.

ORD

O'Hare Intl.

$208 Roundtrip, found 1 day ago

$208

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jun 19 from Denver Intl. to O'Hare Intl., returning Sat, Jun 21, priced at $208 found 1 day ago

Tue, Jul 8 - Sun, Jul 13

DEN

Denver Intl.

ORD

O'Hare Intl.

$209 Roundtrip, found 3 days ago

$209

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Sun, Jul 13, priced at $209 found 3 days ago

Tue, Jul 8 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$211 Roundtrip, found 1 day ago

$211

Roundtrip

found 1 day ago

Select American Airlines flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $211 found 1 day ago

Tue, Jul 8 - Fri, Jul 11

DEN

Denver Intl.

ORD

O'Hare Intl.

$212 Roundtrip, found 1 day ago

$212

Roundtrip

found 1 day ago

Select American Airlines flight, departing Tue, Jul 8 from Denver Intl. to O'Hare Intl., returning Fri, Jul 11, priced at $212 found 1 day ago

Wed, Jul 9 - Sun, Jul 13

DEN

Denver Intl.

ORD

O'Hare Intl.

$216 Roundtrip, found 5 days ago

$216

Roundtrip

found 5 days ago

Select United flight, departing Wed, Jul 9 from Denver Intl. to O'Hare Intl., returning Sun, Jul 13, priced at $216 found 5 days ago

Wed, Jul 9 - Tue, Jul 22

DEN

Denver Intl.

ORD

O'Hare Intl.

$217 Roundtrip, found 9 hours ago

$217

Roundtrip

found 9 hours ago

Select Delta flight, departing Wed, Jul 9 from Denver Intl. to O'Hare Intl., returning Tue, Jul 22, priced at $217 found 9 hours ago

Thu, Aug 21 - Mon, Aug 25

COS

Colorado Springs

ORD

O'Hare Intl.

$255 Roundtrip, found 14 hours ago

$255

Roundtrip

found 14 hours ago

Select United flight, departing Thu, Aug 21 from Colorado Springs to O'Hare Intl., returning Mon, Aug 25, priced at $255 found 14 hours ago

Wed, Jul 9 - Sun, Jul 13

DEN

Denver Intl.

ORD

O'Hare Intl.

$355 Roundtrip, found 5 days ago

$355

Roundtrip

found 5 days ago

Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Wed, Jul 9 from Denver Intl. to O'Hare Intl., returning Sun, Jul 13, priced at $355 found 5 days ago