How does KAYAK find such low prices on flights from Illinois to Philadelphia?

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 Illinois to Philadelphia. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Philadelphia?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to Philadelphia?

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 Philadelphia with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Philadelphia?

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 Philadelphia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$80 CHEAP FLIGHTS from Illinois to Philadelphia

PHL

KAYAK searches hundreds of travel sites at once for deals on flights to Philadelphia

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Cheap Flights from Illinois to Philadelphia

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Philadelphia

Mon, Apr 27 - Mon, May 4

2:20 pm - 5:34 pm

ORD

PHL

2h 14mnonstop

6:34 pm - 8:08 pm

PHL

ORD

2h 34mnonstop

$116Frontier

Mon, Apr 27 - Mon, May 4

2:20 pm - 5:34 pm

ORD

PHL

2h 14mnonstop

6:29 pm - 8:03 pm

PHL

ORD

2h 34mnonstop

$117Frontier

Thu, Apr 16 - Sun, Apr 19

3:52 pm - 2:28 pm

ORD

PHL

21h 36m

1 stop

11:58 am - 1:32 pm

PHL

ORD

2h 34mnonstop

$119Frontier

Sat, Apr 18 - Sun, Apr 19

3:15 pm - 11:56 pm

ORD

PHL

7h 41m

1 stop

11:58 am - 1:32 pm

PHL

ORD

2h 34mnonstop

$120Multiple Airlines

Thu, Apr 16 - Sun, Apr 19

6:34 pm - 2:28 pm

ORD

PHL

18h 54m

1 stop

11:58 am - 1:32 pm

PHL

ORD

2h 34mnonstop

$127Multiple Airlines

Tue, May 12 - Tue, May 12

7:55 am - 10:50 am

MDW

PHL

1h 55mnonstop

2:00 pm - 3:10 pm

PHL

MDW

2h 10mnonstop

$177Southwest

Tue, Apr 14 - Tue, Apr 14

6:00 am - 12:14 pm

MDW

PHL

5h 14m

1 stop

5:19 pm - 10:28 pm

PHL

MDW

6h 09m

1 stop

$197Delta

Thu, Mar 26 - Wed, Apr 1

5:00 am - 9:38 am

BMI

PHL

3h 38m

1 stop

3:50 pm - 9:51 pm

PHL

BMI

7h 01m

1 stop

$269American Airlines

Thu, Mar 5 - Mon, Mar 9

5:01 pm - 12:24 am

MLI

PHL

6h 23m

1 stop

5:00 pm - 10:30 pm

PHL

MLI

6h 30m

1 stop

$279Delta

Fri, Mar 6 - Sun, Mar 8

5:00 am - 9:38 am

BMI

PHL

3h 38m

1 stop

7:14 am - 11:01 am

PHL

BMI

4h 47m

1 stop

$279American Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$80

Most popular time to fly and prices are also 8% lower on average.

Flight from St. Louis to Philadelphia

How does KAYAK find such low prices on flights from Illinois to Philadelphia?
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 Illinois to Philadelphia.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Philadelphia?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Illinois 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 Illinois to Philadelphia?
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 Philadelphia with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Philadelphia?
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 Philadelphia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Wildwood Crest

Newark

North Wildwood

Vineland

Essington

West Chester

Elkton

Pottstown

Willow Grove

Kennett Square

Voorhees

Somers Point

Middletown

Wyomissing

Glen Mills

Phoenixville

Blackwood

Bird in Hand

Millville

Strasburg

Everything you need to know for your flight to Philadelphia

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Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Philadelphia

Philadelphia (PHL)

PHL

$80 Find Cheap Flights from Illinois to Philadelphia

KAYAK searches hundreds of travel sites at once for deals on flights to Philadelphia

Cheap Flights from Illinois to Philadelphia

Recent round-trip flight deals from Illinois to Philadelphia

Recent one-way flight deals from Illinois to Philadelphia

Recent last minute flight deals from Illinois to Philadelphia

Recent direct flight deals from Illinois to Philadelphia

Good to know

FAQs for booking flights from Illinois to Philadelphia

How does KAYAK find such low prices on flights from Illinois to Philadelphia?

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 Illinois to Philadelphia.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Philadelphia?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from Illinois 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 Illinois to Philadelphia?

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 Philadelphia with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Philadelphia?

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 Philadelphia from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Philadelphia?

Everything you need to know for your flight to Philadelphia

Information on the airport you'll fly into in Philadelphia

Cabin class types available on flights to Illinois

Complete your trip to Philadelphia with a hotel stay or car rental

Find direct flights for Philadelphia

Flights to other popular destinations

Flights from domestic origins to Philadelphia

Choose which airport to fly into in Philadelphia

Find deals for your return flight