Flights to Northwest Chicago from Philadelphia - $61

View $61 flight on Thu, Aug 28, 2025Opens in a new window

Popular airlines from Philadelphia to Northwest Chicago

  • Frontier Airlines

    Frontier Airlines

  • Spirit Airlines

    Spirit Airlines

  • Delta

    Delta

  • American Airlines

    American Airlines

  • Southwest Airlines

    Southwest Airlines

  • United

    United

  • JetBlue Airways

    JetBlue Airways

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Cheap Flights from Philadelphia to Northwest Chicago (ILG-CHI)

Prices were available within the past 7 days and start at $61 for one-way flights and $77 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Sep 18 - Thu, Sep 18
PHL
Philadelphia
MDW
Chicago
$77 Roundtrip, found 3 days ago
$77
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Philadelphia to Chicago, returning Thu, Sep 18, priced at $77 found 3 days ago
Frontier Airlines
Thu, Aug 28 - Sun, Aug 31
PHL
Philadelphia
ORD
Chicago
$110 Roundtrip, just found
$110
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Aug 28 from Philadelphia to Chicago, returning Sun, Aug 31, priced at $110 just found
American Airlines
Wed, Aug 27 - Wed, Aug 27
PHL
Philadelphia
ORD
Chicago
$172 Roundtrip, found 16 hours ago
$172
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Wed, Aug 27 from Philadelphia to Chicago, returning Wed, Aug 27, priced at $172 found 16 hours ago
Spirit Airlines
Thu, Aug 14 - Tue, Aug 19
PHL
Philadelphia
ORD
Chicago
$176 Roundtrip, just found
$176
Roundtrip
just found
Select Spirit Airlines flight, departing Thu, Aug 14 from Philadelphia to Chicago, returning Tue, Aug 19, priced at $176 just found
Southwest Airlines
Fri, Oct 24 - Mon, Nov 3
PHL
Philadelphia
MDW
Chicago
$177 Roundtrip, just found
$177
Roundtrip
just found
Select Southwest Airlines flight, departing Fri, Oct 24 from Philadelphia to Chicago, returning Mon, Nov 3, priced at $177 just found
United
Fri, Oct 24 - Mon, Nov 3
PHL
Philadelphia
ORD
Chicago
$177 Roundtrip, just found
$177
Roundtrip
just found
Select United flight, departing Fri, Oct 24 from Philadelphia to Chicago, returning Mon, Nov 3, priced at $177 just found

Find the cheapest month to fly from Philadelphia (PHL) to Chicago (ORD)

September is typically the cheapest month to fly

From $48 - $130 per traveler.

Graph displaying average flight prices per month

Alternative airports

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to O'Hare Intl. ORD. Cheapest option available. Flights from $208
ORD
O'Hare Intl.
Cheapest
Flights from $208
Select flight to Midway Intl. MDW. Flights from $270
MDW
Midway Intl.
Flights from $270
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