Flights from Denver to Allentown

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.

Wed, Aug 20 - Wed, Aug 27

DEN

Denver Intl.

PHL

Philadelphia Intl.

$157 Roundtrip, found 3 days ago

$157

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Denver Intl. to Philadelphia Intl., returning Wed, Aug 27, priced at $157 found 3 days ago

Thu, Aug 21 - Thu, Aug 28

DEN

Denver Intl.

PHL

Philadelphia Intl.

$168 Roundtrip, found 3 days ago

$168

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Aug 21 from Denver Intl. to Philadelphia Intl., returning Thu, Aug 28, priced at $168 found 3 days ago

Fri, Aug 22 - Thu, Aug 28

DEN

Denver Intl.

PHL

Philadelphia Intl.

$176 Roundtrip, found 3 days ago

$176

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 22 from Denver Intl. to Philadelphia Intl., returning Thu, Aug 28, priced at $176 found 3 days ago

Wed, Aug 20 - Wed, Aug 27

DEN

Denver Intl.

PHL

Philadelphia Intl.

$177 Roundtrip, found 3 days ago

$177

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Denver Intl. to Philadelphia Intl., returning Wed, Aug 27, priced at $177 found 3 days ago

Thu, Aug 21 - Mon, Aug 25

DEN

Denver Intl.

PHL

Philadelphia Intl.

$183 Roundtrip, found 3 days ago

$183

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Aug 21 from Denver Intl. to Philadelphia Intl., returning Mon, Aug 25, priced at $183 found 3 days ago

Thu, Aug 21 - Fri, Aug 29

DEN

Denver Intl.

PHL

Philadelphia Intl.

$185 Roundtrip, found 3 days ago

$185

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Aug 21 from Denver Intl. to Philadelphia Intl., returning Fri, Aug 29, priced at $185 found 3 days ago

Wed, Aug 20 - Wed, Aug 27

DEN

Denver Intl.

PHL

Philadelphia Intl.

$191 Roundtrip, found 3 days ago

$191

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Denver Intl. to Philadelphia Intl., returning Wed, Aug 27, priced at $191 found 3 days ago

Fri, Aug 22 - Fri, Aug 29

DEN

Denver Intl.

PHL

Philadelphia Intl.

$193 Roundtrip, found 3 days ago

$193

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 22 from Denver Intl. to Philadelphia Intl., returning Fri, Aug 29, priced at $193 found 3 days ago

Wed, Oct 15 - Wed, Oct 22

DEN

Denver Intl.

PHL

Philadelphia Intl.

$197 Roundtrip, found 5 days ago

$197

Roundtrip

found 5 days ago

Select American Airlines flight, departing Wed, Oct 15 from Denver Intl. to Philadelphia Intl., returning Wed, Oct 22, priced at $197 found 5 days ago

Wed, Oct 15 - Wed, Oct 22

DEN

Denver Intl.

PHL

Philadelphia Intl.

$197 Roundtrip, found 5 days ago

$197

Roundtrip

found 5 days ago

Select American Airlines flight, departing Wed, Oct 15 from Denver Intl. to Philadelphia Intl., returning Wed, Oct 22, priced at $197 found 5 days ago

Mon, Aug 18 - Fri, Aug 29

DEN

Denver Intl.

PHL

Philadelphia Intl.

$200 Roundtrip, found 3 days ago

$200

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 18 from Denver Intl. to Philadelphia Intl., returning Fri, Aug 29, priced at $200 found 3 days ago

Wed, Aug 20 - Wed, Aug 27

DEN

Denver Intl.

PHL

Philadelphia Intl.

$203 Roundtrip, found 3 days ago

$203

Roundtrip

found 3 days ago

Select American Airlines flight, departing Wed, Aug 20 from Denver Intl. to Philadelphia Intl., returning Wed, Aug 27, priced at $203 found 3 days ago

Wed, Aug 20 - Wed, Aug 27

DEN

Denver Intl.

PHL

Philadelphia Intl.

$207 Roundtrip, found 3 days ago

$207

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 20 from Denver Intl. to Philadelphia Intl., returning Wed, Aug 27, priced at $207 found 3 days ago

Wed, Aug 20 - Wed, Aug 27

DEN

Denver Intl.

PHL

Philadelphia Intl.

$211 Roundtrip, found 3 days ago

$211

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Denver Intl. to Philadelphia Intl., returning Wed, Aug 27, priced at $211 found 3 days ago

Wed, Oct 15 - Wed, Oct 22

DEN

Denver Intl.

PHL

Philadelphia Intl.

$213 Roundtrip, found 5 days ago

$213

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Oct 15 from Denver Intl. to Philadelphia Intl., returning Wed, Oct 22, priced at $213 found 5 days ago

Fri, Oct 17 - Sat, Oct 18

DEN

Denver Intl.

PHL

Philadelphia Intl.

$216 Roundtrip, found 5 days ago

$216

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Oct 17 from Denver Intl. to Philadelphia Intl., returning Sat, Oct 18, priced at $216 found 5 days ago

Tue, Oct 14 - Tue, Oct 21

DEN

Denver Intl.

PHL

Philadelphia Intl.

$229 Roundtrip, found 5 days ago

$229

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Tue, Oct 14 from Denver Intl. to Philadelphia Intl., returning Tue, Oct 21, priced at $229 found 5 days ago

Sun, Oct 12 - Sun, Oct 19

DEN

Denver Intl.

TTN

Mercer

$326 Roundtrip, found 5 days ago

$326

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Oct 12 from Denver Intl. to Mercer, returning Sun, Oct 19, priced at $326 found 5 days ago

Wed, Jul 30 - Tue, Aug 5

DEN

Denver Intl.

ABE

Lehigh Valley Intl.

$374 Roundtrip, found 1 day ago

$374

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Jul 30 from Denver Intl. to Lehigh Valley Intl., returning Tue, Aug 5, priced at $374 found 1 day ago

Wed, Jul 30 - Tue, Aug 5

DEN

Denver Intl.

ABE

Lehigh Valley Intl.

$607 Roundtrip, found 1 day ago

$607

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Jul 30 from Denver Intl. to Lehigh Valley Intl., returning Tue, Aug 5, priced at $607 found 1 day ago