How does KAYAK find such low prices on flights from Pennsylvania to Chicago O'Hare Airport?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to Chicago O'Hare Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to Chicago O'Hare Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Pennsylvania to Chicago O'Hare Airport?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago O'Hare Airport with an airline and back to Pennsylvania with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to Chicago O'Hare Airport?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago O'Hare Airport from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$90 CHEAP FLIGHTS from Pennsylvania to Chicago O'Hare (ORD)

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Cheap Flights from Pennsylvania to O'Hare Intl

Cheap flights from Pennsylvania to O'Hare Intl with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Fri, Nov 13 - Sun, Nov 15

9:09 pm - 10:43 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 34mnonstop

4:42 pm - 8:04 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 22mnonstop

$184Frontier

Thu, Nov 12 - Sun, Nov 15

9:09 pm - 10:43 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 34mnonstop

4:42 pm - 8:04 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 22mnonstop

$184Frontier

Sat, Feb 6 - Tue, Feb 9

5:29 am - 6:59 amPHL Philadelphia-ORD Chicago O'Hare Intl

2h 30mnonstop

5:50 pm - 9:00 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 10mnonstop

$185American Airlines

Mon, Nov 16 - Wed, Nov 18

7:26 am - 9:07 amPHL Philadelphia-ORD Chicago O'Hare Intl

2h 41mnonstop

6:30 am - 9:40 amORD Chicago O'Hare Intl-PHL Philadelphia

2h 10mnonstop

$185American Airlines

Mon, Jan 11 - Wed, Jan 13

4:55 pm - 6:31 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 36mnonstop

2:35 pm - 5:44 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 09mnonstop

$185United Airlines

Mon, Nov 2 - Wed, Nov 4

10:54 am - 12:29 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 35mnonstop

11:03 am - 2:17 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 14mnonstop

$185United Airlines

Sat, Feb 13 - Tue, Feb 16

6:00 am - 8:58 amPHL Philadelphia-ORD Chicago O'Hare Intl

3h 58m1 stop Detroit Metropolitan Wayne County

5:55 pm - 12:51 amORD Chicago O'Hare Intl-PHL Philadelphia

5h 56m1 stop Atlanta Hartsfield-Jackson

$205Delta

Wed, Nov 4 - Sat, Nov 7

9:48 am - 12:59 pmPHL Philadelphia-ORD Chicago O'Hare Intl

4h 11m1 stop Detroit Metropolitan Wayne County

11:19 am - 4:44 pmORD Chicago O'Hare Intl-PHL Philadelphia

4h 25m1 stop Detroit Metropolitan Wayne County

$205Delta

Mon, Nov 2 - Mon, Nov 9

9:09 pm - 10:43 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 34mnonstop

2:55 pm - 7:21 amORD Chicago O'Hare Intl-PHL Philadelphia

15h 26m3 stops Kirksville Cannon Memorial Dallas/Fort Worth Atlanta Hartsfield-Jackson

$243Multiple Airlines

Fri, Oct 30 - Mon, Nov 2

9:09 pm - 10:43 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 34mnonstop

2:55 pm - 7:21 amORD Chicago O'Hare Intl-PHL Philadelphia

15h 26m3 stops Kirksville Cannon Memorial Dallas/Fort Worth Atlanta Hartsfield-Jackson

$247Multiple Airlines

Sat, Oct 10 - Sat, Oct 17

9:09 pm - 10:39 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 30mnonstop

4:41 pm - 8:04 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 23mnonstop

$209Frontier

Tue, Oct 13 - Wed, Oct 14

8:30 am - 6:31 pmPHL Philadelphia-ORD Chicago O'Hare Intl

11h 01m1 stop Atlanta Hartsfield-Jackson

6:00 am - 6:15 pmORD Chicago O'Hare Intl-PHL Philadelphia

11h 15m1 stop Atlanta Hartsfield-Jackson

$210Frontier

Sat, Oct 10 - Tue, Nov 17

7:10 pm - 8:40 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 30mnonstop

2:35 pm - 5:47 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 12mnonstop

$290United Airlines

Thu, Oct 15 - Wed, Nov 18

1:24 pm - 2:50 pmPHL Philadelphia-ORD Chicago O'Hare Intl

2h 26mnonstop

8:50 am - 12:05 pmORD Chicago O'Hare Intl-PHL Philadelphia

2h 15mnonstop

$334United Airlines

Thu, Oct 15 - Wed, Nov 4

7:25 am - 9:00 amPHL Philadelphia-ORD Chicago O'Hare Intl

2h 35mnonstop

9:11 pm - 12:19 amORD Chicago O'Hare Intl-PHL Philadelphia

2h 08mnonstop

$334American Airlines

Wed, Oct 14 - Wed, Oct 21

8:07 am - 9:10 amERI Erie-ORD Chicago O'Hare Intl

2h 03mnonstop

9:10 pm - 11:55 pmORD Chicago O'Hare Intl-ERI Erie

1h 45mnonstop

$349American Airlines

Wed, Oct 14 - Wed, Nov 11

7:51 pm - 7:31 amPIT Pittsburgh-ORD Chicago O'Hare Intl

12h 40m1 stop Orlando

7:35 pm - 9:25 pmORD Chicago O'Hare Intl-PIT Pittsburgh

24h 50m2 stops Atlanta Hartsfield-Jackson Jacksonville

$360Multiple Airlines

Tue, Oct 13 - Tue, Oct 20

6:03 pm - 11:57 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

6h 54m1 stop Atlanta Hartsfield-Jackson

1:23 pm - 10:19 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

7h 56m1 stop Atlanta Hartsfield-Jackson

$400Delta

Thu, Oct 15 - Wed, Nov 4

10:37 am - 5:53 pmPHL Philadelphia-ORD Chicago O'Hare Intl

8h 16m1 stop Orlando

2:55 pm - 7:11 amORD Chicago O'Hare Intl-PHL Philadelphia

15h 16m3 stops Kirksville Cannon Memorial Dallas/Fort Worth Atlanta Hartsfield-Jackson

$404Multiple Airlines

Tue, Oct 13 - Tue, Oct 20

6:03 pm - 11:57 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

6h 54m1 stop Atlanta Hartsfield-Jackson

11:19 am - 10:19 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

10h 00m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

$405Delta

Low season	January
High season	July
Cheapest flight	$90

Best time to beat the crowds with an average 14% drop in price.

Most popular time to fly with an average 11% increase in price.

Flight from Philadelphia to Chicago O'Hare Airport

NFlew with United Airlines-Jul 2026

You need to check your own bags in, meaning you wait I line to print the ticket, put the tab on yourself and then go to another line to make sure the suitcase gets placed on the plane and under the 50lb weight limit. A lot of back and forth.

AdamFlew with American Airlines-Jul 2024

Fly out the night before you have anything to do in Chicago so you don’t get delayed and miss out on plans

How does KAYAK find such low prices on flights from Pennsylvania to Chicago O'Hare Airport?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pennsylvania to Chicago O'Hare Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pennsylvania to Chicago O'Hare Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Pennsylvania is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Pennsylvania to Chicago O'Hare Airport?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago O'Hare Airport with an airline and back to Pennsylvania with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pennsylvania to Chicago O'Hare Airport?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago O'Hare Airport from Pennsylvania up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Merrillville

Gurnee

South Haven

Oak Brook

Tinley Park

Hammond

Saint Joseph

Des Plaines

Elk Grove Village

Hoffman Estates

Oakbrook Terrace

Portage

South Holland

Willowbrook

Lansing

Lisle

Alsip

Delavan

Valparaiso

Northbrook

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$90 Find Cheap Flights from Pennsylvania to Chicago O'Hare Airport - Compare and Save

Cheap Flights from Pennsylvania to O'Hare Intl

Cheap flights from Pennsylvania to O'Hare Intl with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

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Flights from Pennsylvania to O'Hare Intl: the best tips from KAYAK users

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