Flights from Allentown to Chicago

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, Sep 25 - Thu, Oct 2

PHL

Philadelphia Intl.

MDW

Midway Intl.

$70 Roundtrip, found 4 hours ago

$70

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to Midway Intl., returning Thu, Oct 2, priced at $70 found 4 hours ago

Thu, Sep 25 - Thu, Oct 2

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$70 Roundtrip, found 4 hours ago

$70

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 2, priced at $70 found 4 hours ago

Thu, Sep 25 - Fri, Sep 26

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$90 Roundtrip, found 5 hours ago

$90

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to O'Hare Intl., returning Fri, Sep 26, priced at $90 found 5 hours ago

Mon, Sep 22 - Thu, Oct 2

PHL

Philadelphia Intl.

MDW

Midway Intl.

$92 Roundtrip, found 4 hours ago

$92

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Philadelphia Intl. to Midway Intl., returning Thu, Oct 2, priced at $92 found 4 hours ago

Mon, Sep 22 - Fri, Oct 3

PHL

Philadelphia Intl.

MDW

Midway Intl.

$114 Roundtrip, found 4 hours ago

$114

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Philadelphia Intl. to Midway Intl., returning Fri, Oct 3, priced at $114 found 4 hours ago

Thu, Sep 11 - Mon, Sep 15

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$120 Roundtrip, found 3 days ago

$120

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Philadelphia Intl. to O'Hare Intl., returning Mon, Sep 15, priced at $120 found 3 days ago

Thu, Sep 25 - Thu, Oct 2

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$125 Roundtrip, found 4 hours ago

$125

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 2, priced at $125 found 4 hours ago

Thu, Sep 11 - Fri, Sep 12

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$127 Roundtrip, found 3 days ago

$127

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Philadelphia Intl. to O'Hare Intl., returning Fri, Sep 12, priced at $127 found 3 days ago

Fri, Sep 26 - Sun, Oct 5

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$134 Roundtrip, found 4 hours ago

$134

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Philadelphia Intl. to O'Hare Intl., returning Sun, Oct 5, priced at $134 found 4 hours ago

Sun, Sep 28 - Fri, Oct 3

PHL

Philadelphia Intl.

MDW

Midway Intl.

$136 Roundtrip, found 4 hours ago

$136

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Sun, Sep 28 from Philadelphia Intl. to Midway Intl., returning Fri, Oct 3, priced at $136 found 4 hours ago

Thu, Sep 18 - Mon, Sep 22

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$146 Roundtrip, found 4 days ago

$146

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Sep 18 from Philadelphia Intl. to O'Hare Intl., returning Mon, Sep 22, priced at $146 found 4 days ago

Thu, Sep 25 - Fri, Oct 3

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$148 Roundtrip, found 4 hours ago

$148

Roundtrip

found 4 hours ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to O'Hare Intl., returning Fri, Oct 3, priced at $148 found 4 hours ago

Thu, Sep 25 - Thu, Oct 2

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$151 Roundtrip, found 4 hours ago

$151

Roundtrip

found 4 hours ago

Select Spirit Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 2, priced at $151 found 4 hours ago

Fri, Aug 8 - Wed, Aug 27

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$154 Roundtrip, found 4 days ago

$154

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Fri, Aug 8 from Philadelphia Intl. to O'Hare Intl., returning Wed, Aug 27, priced at $154 found 4 days ago

Wed, Oct 1 - Thu, Oct 2

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$157 Roundtrip, found 5 hours ago

$157

Roundtrip

found 5 hours ago

Select United flight, departing Wed, Oct 1 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 2, priced at $157 found 5 hours ago

Thu, Sep 25 - Thu, Oct 2

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$157 Roundtrip, found 4 hours ago

$157

Roundtrip

found 4 hours ago

Select American Airlines flight, departing Thu, Sep 25 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 2, priced at $157 found 4 hours ago

Wed, Oct 1 - Thu, Oct 2

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$189 Roundtrip, found 5 hours ago

$189

Roundtrip

found 5 hours ago

Select Spirit Airlines flight, departing Wed, Oct 1 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 2, priced at $189 found 5 hours ago

Tue, Sep 23 - Tue, Sep 30

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$197 Roundtrip, found 4 hours ago

$197

Roundtrip

found 4 hours ago

Select Delta flight, departing Tue, Sep 23 from Philadelphia Intl. to O'Hare Intl., returning Tue, Sep 30, priced at $197 found 4 hours ago

Fri, Sep 12 - Wed, Sep 17

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$226 Roundtrip, found 3 days ago

$226

Roundtrip

found 3 days ago

Select JetBlue Airways flight, departing Fri, Sep 12 from Philadelphia Intl. to O'Hare Intl., returning Wed, Sep 17, priced at $226 found 3 days ago

Fri, Sep 12 - Sun, Sep 14

TTN

Mercer

ORD

O'Hare Intl.

$228 Roundtrip, found 14 hours ago

$228

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Fri, Sep 12 from Mercer to O'Hare Intl., returning Sun, Sep 14, priced at $228 found 14 hours ago