Flights from Chicago to Lone Tree

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.

Mon, Jul 7 - Tue, Jul 15

ORD

O'Hare Intl.

DEN

Denver Intl.

$143 Roundtrip, found 6 days ago

$143

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Jul 7 from O'Hare Intl. to Denver Intl., returning Tue, Jul 15, priced at $143 found 6 days ago

Sun, Jul 6 - Tue, Jul 15

ORD

O'Hare Intl.

DEN

Denver Intl.

$144 Roundtrip, found 6 days ago

$144

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Jul 6 from O'Hare Intl. to Denver Intl., returning Tue, Jul 15, priced at $144 found 6 days ago

Wed, Jul 30 - Tue, Aug 5

ORD

O'Hare Intl.

DEN

Denver Intl.

$148 Roundtrip, found 3 hours ago

$148

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Wed, Jul 30 from O'Hare Intl. to Denver Intl., returning Tue, Aug 5, priced at $148 found 3 hours ago

Sat, Jul 5 - Tue, Jul 15

ORD

O'Hare Intl.

DEN

Denver Intl.

$150 Roundtrip, found 6 days ago

$150

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 5 from O'Hare Intl. to Denver Intl., returning Tue, Jul 15, priced at $150 found 6 days ago

Thu, Jul 10 - Mon, Jul 14

ORD

O'Hare Intl.

DEN

Denver Intl.

$158 Roundtrip, found 6 days ago

$158

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Jul 10 from O'Hare Intl. to Denver Intl., returning Mon, Jul 14, priced at $158 found 6 days ago

Sun, Jul 6 - Thu, Jul 10

ORD

O'Hare Intl.

DEN

Denver Intl.

$159 Roundtrip, found 6 days ago

$159

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Jul 6 from O'Hare Intl. to Denver Intl., returning Thu, Jul 10, priced at $159 found 6 days ago

Tue, Jul 8 - Sun, Jul 13

ORD

O'Hare Intl.

DEN

Denver Intl.

$164 Roundtrip, found 6 days ago

$164

Roundtrip

found 6 days ago

Select American Airlines flight, departing Tue, Jul 8 from O'Hare Intl. to Denver Intl., returning Sun, Jul 13, priced at $164 found 6 days ago

Sat, Jul 5 - Thu, Jul 10

ORD

O'Hare Intl.

DEN

Denver Intl.

$165 Roundtrip, found 6 days ago

$165

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 5 from O'Hare Intl. to Denver Intl., returning Thu, Jul 10, priced at $165 found 6 days ago

Mon, Jul 28 - Sun, Aug 3

ORD

O'Hare Intl.

DEN

Denver Intl.

$168 Roundtrip, found 3 hours ago

$168

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Mon, Jul 28 from O'Hare Intl. to Denver Intl., returning Sun, Aug 3, priced at $168 found 3 hours ago

Tue, Jul 29 - Tue, Aug 5

ORD

O'Hare Intl.

DEN

Denver Intl.

$178 Roundtrip, found 3 hours ago

$178

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Tue, Jul 29 from O'Hare Intl. to Denver Intl., returning Tue, Aug 5, priced at $178 found 3 hours ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$179 Roundtrip, found 3 hours ago

$179

Roundtrip

found 3 hours ago

Select United flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $179 found 3 hours ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$179 Roundtrip, found 3 hours ago

$179

Roundtrip

found 3 hours ago

Select American Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $179 found 3 hours ago

Sun, Jul 6 - Wed, Jul 16

ORD

O'Hare Intl.

DEN

Denver Intl.

$180 Roundtrip, found 6 days ago

$180

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Jul 6 from O'Hare Intl. to Denver Intl., returning Wed, Jul 16, priced at $180 found 6 days ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$182 Roundtrip, found 3 hours ago

$182

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $182 found 3 hours ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$185 Roundtrip, found 3 hours ago

$185

Roundtrip

found 3 hours ago

Select United flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $185 found 3 hours ago

Sat, Jul 5 - Wed, Jul 16

ORD

O'Hare Intl.

DEN

Denver Intl.

$186 Roundtrip, found 6 days ago

$186

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 5 from O'Hare Intl. to Denver Intl., returning Wed, Jul 16, priced at $186 found 6 days ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$201 Roundtrip, found 3 hours ago

$201

Roundtrip

found 3 hours ago

Select American Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $201 found 3 hours ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$203 Roundtrip, found 3 hours ago

$203

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $203 found 3 hours ago

Thu, Jul 10 - Mon, Jul 14

ORD

O'Hare Intl.

DEN

Denver Intl.

$325 Roundtrip, found 6 days ago

$325

Roundtrip

found 6 days ago

Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Jul 10 from O'Hare Intl. to Denver Intl., returning Mon, Jul 14, priced at $325 found 6 days ago

Thu, Jul 31 - Wed, Aug 6

ORD

O'Hare Intl.

DEN

Denver Intl.

$433 Roundtrip, found 3 hours ago

$433

Roundtrip

found 3 hours ago

Select Delta flight, departing Thu, Jul 31 from O'Hare Intl. to Denver Intl., returning Wed, Aug 6, priced at $433 found 3 hours ago