Flights from Philadelphia to St. Charles

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.

Mon, Oct 20 - Thu, Oct 23

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$107 Roundtrip, found 5 days ago

$107

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Oct 20 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $107 found 5 days ago

Sun, Oct 19 - Thu, Oct 23

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$108 Roundtrip, found 5 days ago

$108

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Oct 19 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $108 found 5 days ago

Sun, Oct 19 - Fri, Oct 24

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$109 Roundtrip, found 5 days ago

$109

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Oct 19 from Philadelphia Intl. to O'Hare Intl., returning Fri, Oct 24, priced at $109 found 5 days ago

Thu, Sep 4 - Mon, Sep 8

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$120 Roundtrip, found 6 days ago

$120

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Philadelphia Intl. to O'Hare Intl., returning Mon, Sep 8, priced at $120 found 6 days ago

Thu, Sep 4 - Fri, Sep 5

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$127 Roundtrip, found 6 days ago

$127

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Philadelphia Intl. to O'Hare Intl., returning Fri, Sep 5, priced at $127 found 6 days ago

Thu, Aug 28 - Thu, Sep 4

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$134 Roundtrip, found 4 days ago

$134

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Aug 28 from Philadelphia Intl. to O'Hare Intl., returning Thu, Sep 4, priced at $134 found 4 days ago

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$142 Roundtrip, found 5 days ago

$142

Roundtrip

found 5 days ago

Select United flight, departing Tue, Oct 21 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $142 found 5 days ago

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$148 Roundtrip, found 5 days ago

$148

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Tue, Oct 21 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $148 found 5 days ago

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$152 Roundtrip, found 5 days ago

$152

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Oct 21 from Philadelphia Intl. to O'Hare Intl., returning Thu, Oct 23, priced at $152 found 5 days ago

Fri, Sep 5 - Sun, Sep 7

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$156 Roundtrip, found 6 days ago

$156

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Sep 5 from Philadelphia Intl. to O'Hare Intl., returning Sun, Sep 7, priced at $156 found 6 days ago

Fri, Aug 29 - Thu, Sep 4

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$157 Roundtrip, found 4 days ago

$157

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Philadelphia Intl. to O'Hare Intl., returning Thu, Sep 4, priced at $157 found 4 days ago

Wed, Sep 10 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$177 Roundtrip, just found

$177

Roundtrip

just found

Select United flight, departing Wed, Sep 10 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $177 just found

Wed, Sep 10 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$177 Roundtrip, just found

$177

Roundtrip

just found

Select American Airlines flight, departing Wed, Sep 10 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $177 just found

Wed, Sep 10 - Sat, Sep 13

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$180 Roundtrip, just found

$180

Roundtrip

just found

Select Spirit Airlines flight, departing Wed, Sep 10 from Philadelphia Intl. to O'Hare Intl., returning Sat, Sep 13, priced at $180 just found

Tue, Oct 21 - Tue, Oct 21

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$191 Roundtrip, found 5 days ago

$191

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Oct 21 from Philadelphia Intl. to O'Hare Intl., returning Tue, Oct 21, priced at $191 found 5 days ago

Thu, Sep 4 - Tue, Sep 9

PHL

Philadelphia Intl.

ORD

O'Hare Intl.

$201 Roundtrip, found 6 days ago

$201

Roundtrip

found 6 days ago

Select JetBlue Airways flight, departing Thu, Sep 4 from Philadelphia Intl. to O'Hare Intl., returning Tue, Sep 9, priced at $201 found 6 days ago

Tue, Oct 21 - Wed, Oct 22

TTN

Mercer

ORD

O'Hare Intl.

$201 Roundtrip, found 5 days ago

$201

Roundtrip

found 5 days ago

Select American Airlines flight, departing Tue, Oct 21 from Mercer to O'Hare Intl., returning Wed, Oct 22, priced at $201 found 5 days ago

Wed, Aug 6 - Sat, Aug 23

TTN

Mercer

MDW

Midway Intl.

$208 Roundtrip, found 2 days ago

$208

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Mercer to Midway Intl., returning Sat, Aug 23, priced at $208 found 2 days ago

Wed, Aug 6 - Thu, Aug 21

PHL

Philadelphia Intl.

MDW

Midway Intl.

$234 Roundtrip, found 2 days ago

$234

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Philadelphia Intl. to Midway Intl., returning Thu, Aug 21, priced at $234 found 2 days ago

Sat, Aug 9 - Sat, Aug 23

ABE

Lehigh Valley Intl.

MDW

Midway Intl.

$330 Roundtrip, found 2 days ago

$330

Roundtrip

found 2 days ago

Select Delta flight, departing Sat, Aug 9 from Lehigh Valley Intl. to Midway Intl., returning Sat, Aug 23, priced at $330 found 2 days ago