Flights from Philadelphia to Northern Illinois

Cheapest flights from Philadelphia

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, Sep 3 - Tue, Sep 9

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$117 Roundtrip, found 1 day ago

$117

Roundtrip

found 1 day ago

Select United flight, departing Wed, Sep 3 from Philadelphia Intl. to O'Hare Intl., returning Tue, Sep 9, priced at $117 found 1 day ago

Sat, Sep 13 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$117 Roundtrip, found 18 hours ago

$117

Roundtrip

found 18 hours ago

Select United flight, departing Sat, Sep 13 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $117 found 18 hours ago

Sat, Sep 13 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$117 Roundtrip, found 18 hours ago

$117

Roundtrip

found 18 hours ago

Select American Airlines flight, departing Sat, Sep 13 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $117 found 18 hours ago

Mon, Aug 4 - Sat, Aug 9

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$118 Roundtrip, found 1 day ago

$118

Roundtrip

found 1 day ago

Select United flight, departing Mon, Aug 4 from Philadelphia Intl. to O'Hare Intl., returning Sat, Aug 9, priced at $118 found 1 day ago

Sun, Sep 7 - Thu, Sep 25

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$120 Roundtrip, found 2 days ago

$120

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Sep 7 from Philadelphia Intl. to O'Hare Intl., returning Thu, Sep 25, priced at $120 found 2 days ago

Mon, Aug 4 - Sat, Aug 9

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$124 Roundtrip, found 1 day ago

$124

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Aug 4 from Philadelphia Intl. to O'Hare Intl., returning Sat, Aug 9, priced at $124 found 1 day ago

Mon, Aug 11 - Fri, Aug 15

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$124 Roundtrip, found 2 days ago

$124

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Philadelphia Intl. to O'Hare Intl., returning Fri, Aug 15, priced at $124 found 2 days ago

Mon, Aug 4 - Sat, Aug 9

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$125 Roundtrip, found 1 day ago

$125

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Mon, Aug 4 from Philadelphia Intl. to O'Hare Intl., returning Sat, Aug 9, priced at $125 found 1 day ago

Fri, Sep 5 - Sun, Sep 7

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$128 Roundtrip, found 4 days ago

$128

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Sep 5 from Philadelphia Intl. to O'Hare Intl., returning Sun, Sep 7, priced at $128 found 4 days ago

Tue, Sep 9 - Sat, Sep 27

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$130 Roundtrip, found 2 days ago

$130

Roundtrip

found 2 days ago

Select American Airlines flight, departing Tue, Sep 9 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 27, priced at $130 found 2 days ago

Sat, Sep 13 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$132 Roundtrip, found 18 hours ago

$132

Roundtrip

found 18 hours ago

Select United flight, departing Sat, Sep 13 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $132 found 18 hours ago

Sun, Aug 10 - Thu, Aug 14

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$134 Roundtrip, found 2 days ago

$134

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Aug 10 from Philadelphia Intl. to O'Hare Intl., returning Thu, Aug 14, priced at $134 found 2 days ago

Sat, Sep 13 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$136 Roundtrip, found 18 hours ago

$136

Roundtrip

found 18 hours ago

Select American Airlines flight, departing Sat, Sep 13 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $136 found 18 hours ago

Sun, Aug 10 - Fri, Aug 15

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$138 Roundtrip, found 2 days ago

$138

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Aug 10 from Philadelphia Intl. to O'Hare Intl., returning Fri, Aug 15, priced at $138 found 2 days ago

Tue, Aug 12 - Sat, Aug 16

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$141 Roundtrip, found 2 days ago

$141

Roundtrip

found 2 days ago

Select United flight, departing Tue, Aug 12 from Philadelphia Intl. to O'Hare Intl., returning Sat, Aug 16, priced at $141 found 2 days ago

Wed, Sep 3 - Tue, Sep 9

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$142 Roundtrip, found 1 day ago

$142

Roundtrip

found 1 day ago

Select United flight, departing Wed, Sep 3 from Philadelphia Intl. to O'Hare Intl., returning Tue, Sep 9, priced at $142 found 1 day ago

Wed, Oct 8 - Wed, Oct 15

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$161 Roundtrip, found 4 days ago

$161

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Wed, Oct 8 from Philadelphia Intl. to O'Hare Intl., returning Wed, Oct 15, priced at $161 found 4 days ago

Wed, Oct 8 - Wed, Oct 15

ABE

Lehigh Valley Intl.

ORD

O'Hare Intl.

$179 Roundtrip, found 19 hours ago

$179

Roundtrip

found 19 hours ago

Select American Airlines flight, departing Wed, Oct 8 from Lehigh Valley Intl. to O'Hare Intl., returning Wed, Oct 15, priced at $179 found 19 hours ago

Sat, Sep 13 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$191 Roundtrip, found 18 hours ago

$191

Roundtrip

found 18 hours ago

Select Delta flight, departing Sat, Sep 13 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $191 found 18 hours ago

Sat, Jul 12 - Tue, Jul 15

TTN

Mercer

ORD

O'Hare Intl.

$302 Roundtrip, found 2 days ago

$302

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from Mercer to O'Hare Intl., returning Tue, Jul 15, priced at $302 found 2 days ago