Flights from Allentown to Denver

Cheapest flights from Allentown

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 - Tue, Aug 12

PHL

Philadelphia Intl.

DEN

Denver Intl.

$204 Roundtrip, found 4 hours ago

$204

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Thu, Aug 7 from Philadelphia Intl. to Denver Intl., returning Tue, Aug 12, priced at $204 found 4 hours ago

Wed, Aug 20 - Sun, Aug 24

PHL

Philadelphia Intl.

DEN

Denver Intl.

$217 Roundtrip, found 3 days ago

$217

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Philadelphia Intl. to Denver Intl., returning Sun, Aug 24, priced at $217 found 3 days ago

Sat, Aug 23 - Wed, Aug 27

PHL

Philadelphia Intl.

DEN

Denver Intl.

$222 Roundtrip, found 3 days ago

$222

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Aug 23 from Philadelphia Intl. to Denver Intl., returning Wed, Aug 27, priced at $222 found 3 days ago

Wed, Aug 20 - Sun, Aug 24

PHL

Philadelphia Intl.

DEN

Denver Intl.

$232 Roundtrip, found 3 days ago

$232

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Philadelphia Intl. to Denver Intl., returning Sun, Aug 24, priced at $232 found 3 days ago

Sun, Aug 17 - Wed, Aug 27

PHL

Philadelphia Intl.

DEN

Denver Intl.

$244 Roundtrip, found 3 days ago

$244

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sun, Aug 17 from Philadelphia Intl. to Denver Intl., returning Wed, Aug 27, priced at $244 found 3 days ago

Fri, Aug 15 - Fri, Aug 15

PHL

Philadelphia Intl.

DEN

Denver Intl.

$247 Roundtrip, found 3 days ago

$247

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 15 from Philadelphia Intl. to Denver Intl., returning Fri, Aug 15, priced at $247 found 3 days ago

Tue, Aug 5 - Wed, Aug 13

PHL

Philadelphia Intl.

DEN

Denver Intl.

$247 Roundtrip, found 1 day ago

$247

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Aug 5 from Philadelphia Intl. to Denver Intl., returning Wed, Aug 13, priced at $247 found 1 day ago

Tue, Aug 5 - Sat, Aug 9

PHL

Philadelphia Intl.

DEN

Denver Intl.

$248 Roundtrip, found 1 day ago

$248

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Aug 5 from Philadelphia Intl. to Denver Intl., returning Sat, Aug 9, priced at $248 found 1 day ago

Wed, Aug 20 - Sun, Aug 24

PHL

Philadelphia Intl.

DEN

Denver Intl.

$252 Roundtrip, found 3 days ago

$252

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 20 from Philadelphia Intl. to Denver Intl., returning Sun, Aug 24, priced at $252 found 3 days ago

Fri, Aug 15 - Fri, Aug 15

PHL

Philadelphia Intl.

DEN

Denver Intl.

$255 Roundtrip, found 3 days ago

$255

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 15 from Philadelphia Intl. to Denver Intl., returning Fri, Aug 15, priced at $255 found 3 days ago

Tue, Aug 19 - Tue, Aug 26

PHL

Philadelphia Intl.

DEN

Denver Intl.

$255 Roundtrip, found 3 days ago

$255

Roundtrip

found 3 days ago

Select American Airlines flight, departing Tue, Aug 19 from Philadelphia Intl. to Denver Intl., returning Tue, Aug 26, priced at $255 found 3 days ago

Fri, Aug 15 - Fri, Aug 15

PHL

Philadelphia Intl.

DEN

Denver Intl.

$261 Roundtrip, found 3 days ago

$261

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 15 from Philadelphia Intl. to Denver Intl., returning Fri, Aug 15, priced at $261 found 3 days ago

Fri, Aug 15 - Fri, Aug 15

PHL

Philadelphia Intl.

DEN

Denver Intl.

$261 Roundtrip, found 3 days ago

$261

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 15 from Philadelphia Intl. to Denver Intl., returning Fri, Aug 15, priced at $261 found 3 days ago

Wed, Aug 20 - Sun, Aug 24

PHL

Philadelphia Intl.

DEN

Denver Intl.

$266 Roundtrip, found 3 days ago

$266

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Aug 20 from Philadelphia Intl. to Denver Intl., returning Sun, Aug 24, priced at $266 found 3 days ago

Sun, Aug 17 - Thu, Aug 21

PHL

Philadelphia Intl.

DEN

Denver Intl.

$266 Roundtrip, found 3 days ago

$266

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sun, Aug 17 from Philadelphia Intl. to Denver Intl., returning Thu, Aug 21, priced at $266 found 3 days ago

Fri, Aug 1 - Sat, Aug 9

PHL

Philadelphia Intl.

DEN

Denver Intl.

$268 Roundtrip, found 1 day ago

$268

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Philadelphia Intl. to Denver Intl., returning Sat, Aug 9, priced at $268 found 1 day ago

Thu, Aug 7 - Tue, Aug 12

PHL

Philadelphia Intl.

DEN

Denver Intl.

$338 Roundtrip, found 4 hours ago

$338

Roundtrip

found 4 hours ago

Select Delta flight, departing Thu, Aug 7 from Philadelphia Intl. to Denver Intl., returning Tue, Aug 12, priced at $338 found 4 hours ago

Wed, Aug 20 - Sun, Aug 24

TTN

Mercer

DEN

Denver Intl.

$351 Roundtrip, found 3 days ago

$351

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Aug 20 from Mercer to Denver Intl., returning Sun, Aug 24, priced at $351 found 3 days ago

Fri, Aug 1 - Tue, Aug 12

ABE

Lehigh Valley Intl.

DEN

Denver Intl.

$373 Roundtrip, found 1 day ago

$373

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 1 from Lehigh Valley Intl. to Denver Intl., returning Tue, Aug 12, priced at $373 found 1 day ago

Thu, Aug 7 - Tue, Aug 12

PHL

Philadelphia Intl.

DEN

Denver Intl.

$708 Roundtrip, found 4 hours ago

$708

Roundtrip

found 4 hours ago

Select JetBlue Airways flight, departing Thu, Aug 7 from Philadelphia Intl. to Denver Intl., returning Tue, Aug 12, priced at $708 found 4 hours ago