How many flights depart from Philadelphia to Illinois on average per week?

248 flights are operational weekly from Philadelphia to Illinois as of March 2026. The most popular departure day for this route is Tue, with 20% of flights per week taking off on this day.

What airlines fly to Illinois?

United Airlines, American Airlines and Spirit Airlines are the top three most popular airlines that fly to Illinois from Philadelphia according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Philadelphia to Illinois?

Frontier, Southwest, and Delta are the most popular carriers operating from Philadelphia to Illinois

How many flights depart from Philadelphia to Illinois on average per day?

The number of flights available between Philadelphia and Illinois is 35 per day as of March 2026. The most frequent departure time is 8:00AM, with 45% of daily flights leaving in the afternoon.

When did momondo last update prices for flights from Philadelphia Airport to Illinois?

Prices for flights from Philadelphia Airport to Illinois are updated daily.

How many operators does momondo search for flights from Philadelphia Airport to Illinois?

The number of operators available for flights from Philadelphia Airport to Illinois is 6 as of March 2026.

How old do you have to be to fly from Philadelphia Airport to Illinois?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Philadelphia Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$87 Cheap Flights from Philadelphia to Illinois in 2026

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Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:52 pm - 9:36 am

PHL

ORD

13h 44m

1 stop

5:50 am - 5:49 pm

ORD

PHL

10h 59m

1 stop

$177Multiple Airlines

Tue, Apr 14 - Thu, Apr 16

6:29 pm - 8:03 pm

PHL

ORD

2h 34mnonstop

2:20 pm - 5:34 pm

ORD

PHL

2h 14mnonstop

$178Frontier

Fri, May 1 - Mon, May 4

1:32 pm - 7:51 pm

PHL

ORD

7h 19m

1 stop

7:56 pm - 11:22 pm

ORD

PHL

2h 26mnonstop

$179Frontier

Thu, May 7 - Sun, May 10

6:05 am - 12:27 pm

PHL

MLI

7h 22m

1 stop

12:51 pm - 6:43 pm

MLI

PHL

4h 52m

1 stop

$291American Airlines

Sat, May 2 - Wed, May 6

6:00 am - 10:54 am

PHL

CMI

5h 54m

1 stop

6:36 pm - 11:59 pm

CMI

PHL

4h 23m

1 stop

$298American Airlines

Thu, Aug 27 - Mon, Aug 31

3:42 pm - 10:35 pm

PHL

MLI

7h 53m

1 stop

5:11 pm - 12:59 am

MLI

PHL

6h 48m

1 stop

$311Delta

Sat, May 2 - Tue, May 5

6:10 am - 7:35 am

PHL

STL

2h 25mnonstop

1:35 pm - 4:45 pm

STL

PHL

2h 10mnonstop

$319Southwest

Mon, Apr 20 - Mon, Apr 20

6:24 pm - 10:21 pm

PHL

MLI

4h 57m

1 stop

5:17 pm - 12:57 am

MLI

PHL

6h 40m

1 stop

$320Delta

Tue, May 19 - Sat, May 23

8:35 pm - 11:59 pm

PHL

BMI

4h 24m

1 stop

6:51 pm - 12:59 am

BMI

PHL

5h 08m

1 stop

$329United Airlines

Fri, May 8 - Sun, May 10

5:05 pm - 10:33 pm

PHL

CMI

6h 28m

1 stop

1:36 pm - 9:44 pm

CMI

PHL

7h 08m

1 stop

$368United Airlines

Tue, May 5 - Sat, May 9

Frontier flights from Philadelphia to Illinois

Our best Frontier deals on Philadelphia to Illinois flight tickets

Frontier

May 1

PHL6:29 pmPhiladelphia

2h 34m

ORD8:03 pmChicago O'Hare Intl

May 4

ORD2:20 pmChicago O'Hare Intl

2h 14m

PHL5:34 pmPhiladelphia

$178

Frontier

May 7

PHL1:32 pmPhiladelphia

7h 19m

1 stop

ORD7:51 pmChicago O'Hare Intl

May 10

ORD7:56 pmChicago O'Hare Intl

2h 26m

PHL11:22 pmPhiladelphia

$179

Frontier

Apr 30

PHL7:45 amPhiladelphia

8h 02m

1 stop

ORD2:47 pmChicago O'Hare Intl

May 4

ORD12:37 pmChicago O'Hare Intl

10h 52m

1 stop

PHL12:29 amPhiladelphia

$180

American Airlines flights from Philadelphia to Illinois

Our best American Airlines deals on Philadelphia to Illinois flight tickets

American Airlines

Apr 22

PHL3:45 pmPhiladelphia

2h 44m

ORD5:29 pmChicago O'Hare Intl

Apr 26

ORD5:00 amChicago O'Hare Intl

2h 07m

PHL8:07 amPhiladelphia

$217

American Airlines

Apr 30

PHL7:15 amPhiladelphia

2h 39m

ORD8:54 amChicago O'Hare Intl

May 2

ORD1:25 pmChicago O'Hare Intl

2h 12m

PHL4:37 pmPhiladelphia

$221

American Airlines

Mar 21

PHL5:30 pmPhiladelphia

2h 33m

ORD7:03 pmChicago O'Hare Intl

Apr 21

ORD8:50 pmChicago O'Hare Intl

2h 09m

PHL11:59 pmPhiladelphia

$264

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 4/14

8:52 pm-9:36 am

1 stop13h 44m

Chicago O'Hare Intl

Thu 4/16

5:50 am-5:49 pm

1 stop10h 59m

$177

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Fri 5/1

6:29 pm-8:03 pm

Nonstop2h 34m

Chicago O'Hare Intl

Mon 5/4

2:20 pm-5:34 pm

Nonstop2h 14m

$178

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 5/7

1:32 pm-7:51 pm

1 stop7h 19m

Chicago O'Hare Intl

Sun 5/10

7:56 pm-11:22 pm

Nonstop2h 26m

$179

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Sat 5/2

6:05 am-12:27 pm

1 stop7h 22m

Moline Quad-City

Wed 5/6

12:51 pm-6:43 pm

1 stop4h 52m

$291

PhiladelphiaChampaign

PHL - CMI

PHLCMI

Philadelphia

Thu 8/27

6:00 am-10:54 am

1 stop5h 54m

Champaign University-Willard

Mon 8/31

6:36 pm-11:59 pm

1 stop4h 23m

$298

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Sat 5/2

3:42 pm-10:35 pm

1 stop7h 53m

Moline Quad-City

Tue 5/5

5:11 pm-12:59 am

1 stop6h 48m

$311

Quickest round-trip

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Mon 4/20

6:10 am-7:35 am

Nonstop2h 25m

Lambert-St Louis

Mon 4/20

1:35 pm-4:45 pm

Nonstop2h 10m

$319

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Tue 5/19

6:24 pm-10:21 pm

1 stop4h 57m

Moline Quad-City

Sat 5/23

5:17 pm-12:57 am

1 stop6h 40m

$320

PhiladelphiaBloomington

PHL - BMI

PHLBMI

Philadelphia

Fri 5/8

8:35 pm-11:59 pm

1 stop4h 24m

Bloomington-Normal

Sun 5/10

6:51 pm-12:59 am

1 stop5h 08m

$329

PhiladelphiaChampaign

PHL - CMI

PHLCMI

Philadelphia

Tue 5/5

5:05 pm-10:33 pm

1 stop6h 28m

Champaign University-Willard

Sat 5/9

1:36 pm-9:44 pm

1 stop7h 08m

$368

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Philadelphia to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Philadelphia is in January. Flight prices, which tend to average around $188, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $188.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Philadelphia to Illinois is on a Friday when prices can be found for as low as $307. Flights from Philadelphia to Illinois on a Sunday will generally be more expensive and average around $500. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Philadelphia to Illinois during this time can be as low as $272. Flights at noon are often more expensive with an average ticket price of $413.

What is the cheapest Philadelphia to Illinois flight route?

Fly from Philadelphia to Chicago O'Hare Intl for the best Philadelphia - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $284 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Philadelphia for as low as $206 on momondo.

What cabin class options are available on Philadelphia to Illinois flights?

There are 4 cabin classes available to choose from on Philadelphia to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Philadelphia to Illinois flights?

You could potentially save up to 5% on your flight if you consider stops on a Philadelphia to Illinois flight.

Cheap Philadelphia to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Illinois

Best Price Found	$193
Fastest flight time	2h 00m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Philadelphia in the past 72 hours is $193. The best round-trip flight deal from Philadelphia to Illinois found on momondo in the last 72 hours is $304.

The fastest flight from Philadelphia to Illinois takes 2h 00m

Direct flights go from Philadelphia to Illinois every day.

There are 98 airports in Illinois. From Philadelphia there are direct flights to Chicago Midway (MDW).

Search flight deals

When did momondo last update prices for flights from Philadelphia Airport to Illinois?
Prices for flights from Philadelphia Airport to Illinois are updated daily.
How many operators does momondo search for flights from Philadelphia Airport to Illinois?
The number of operators available for flights from Philadelphia Airport to Illinois is 6 as of March 2026.
How old do you have to be to fly from Philadelphia Airport to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Philadelphia Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Philadelphia to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Philadelphia to Illinois is Boeing 737-800, representing 23.87% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 13.67%, Airbus A319 at 12.64%, and Boeing 737 MAX 9 at 8.99%.

Best airlines flying from Philadelphia to Illinois

Compare and see reviews for airlines that fly from Philadelphia to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $74	Free Cancellation	Rating 5.7 3,027 reviews	Search Frontier flights
Delta	PriceFrom $98	Free Cancellation	Rating 7.9 8,288 reviews	Search Delta flights
United Airlines	PriceFrom $155	Free Cancellation	Rating 7.4 9,431 reviews	Search United Airlines flights
Southwest	PriceFrom $158	Free Cancellation	Rating 8.0 4,320 reviews	Search Southwest flights
American Airlines	PriceFrom $163	Free Cancellation	Rating 7.1 11,468 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Illinois?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Illinois. momondo saves you time and could save you money on your trip.

Can I find flights from Philadelphia to Illinois with flexible booking policies on momondo?

All flight searches from Philadelphia to Illinois on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Philadelphia to Illinois?

Once all potential Philadelphia to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Philadelphia to Illinois right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Philadelphia and alert you when they change.

An easier way to manage your Illinois trip

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Cheap flights from Philadelphia to Illinois from $87

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Illinois departing on 4/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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See travel insights to Illinois from

How to get the cheapest flight ticket from Philadelphia to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Philadelphia to Illinois flight route?

How far in advance should I book a flight to Illinois?

What cabin class options are available on Philadelphia to Illinois flights?

Can stopping save me money on Philadelphia to Illinois flights?

What is the cheapest airline that flies from Philadelphia to Illinois?

What airlines fly to Illinois?

How many flights depart from Philadelphia to Illinois on average per day?

How many flights depart from Philadelphia to Illinois on average per week?

Cheap Philadelphia to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Best airlines flying from Philadelphia to Illinois

Compare and see reviews for airlines that fly from Philadelphia to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

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According to popular flight searches on momondo this year

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