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Cheap flights from Illinois to Philadelphia from $73

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Philadelphia departing on 9/15. 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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0 bags

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Find the cheapest flights from Illinois to Philadelphia

Cheap round-trip flights

Frontier Logo
2:45 pm - 6:00 pmORD-PHL
2h 15mnonstop
Frontier Logo
4:10 pm - 5:40 pmPHL-ORD
2h 30mnonstop
$127Frontier
Find Deal
sáb., oct. 18 - jue., oct. 23
Frontier Logo
6:50 pm - 10:10 pmORD-PHL
2h 20mnonstop
Frontier Logo
4:10 pm - 5:40 pmPHL-ORD
2h 30mnonstop
$128Frontier
Find Deal
jue., oct. 9 - lun., oct. 13
Logo
2:45 pm - 6:00 pmORD-PHL
2h 15mnonstop
Logo
11:36 am - 3:56 pmPHL-ORD
5h 20m1 stop
$132
Find Deal
sáb., oct. 18 - lun., oct. 20
Southwest Logo
10:20 am - 1:15 pmMDW-PHL
1h 55mnonstop
Southwest Logo
6:05 pm - 7:10 pmPHL-MDW
2h 05mnonstop
$139Southwest
Find Deal
mar., oct. 21 - mar., oct. 21
American Airlines Logo
8:35 am - 11:36 amORD-PHL
2h 01mnonstop
American Airlines Logo
2:15 pm - 3:43 pmPHL-ORD
2h 28mnonstop
$139American Airlines
Find Deal
mar., sep. 23 - mar., sep. 30
Logo
11:57 am - 11:47 pmORD-PHL
10h 50m1 stop
Logo
10:21 am - 11:58 amPHL-ORD
2h 37mnonstop
$141
Find Deal
mié., sep. 17 - dom., sep. 21
United Airlines Logo
11:05 am - 2:17 pmORD-PHL
2h 12mnonstop
United Airlines Logo
10:10 am - 11:32 amPHL-ORD
2h 22mnonstop
$154United Airlines
Find Deal
mar., sep. 16 - mar., sep. 23
United Airlines Logo
7:30 am - 10:39 amORD-PHL
2h 09mnonstop
United Airlines Logo
6:30 am - 7:52 amPHL-ORD
2h 22mnonstop
$158United Airlines
Find Deal
jue., oct. 2 - sáb., oct. 4
Southwest Logo
6:55 pm - 9:55 pmMDW-PHL
2h 00mnonstop
Southwest Logo
3:20 pm - 4:25 pmPHL-MDW
2h 05mnonstop
$178Southwest
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lun., sep. 22 - mar., sep. 23
American Airlines Logo
5:11 pm - 1:10 amPIA-PHL
6h 59m1 stop
American Airlines Logo
5:15 pm - 11:23 pmPHL-PIA
7h 08m1 stop
$249American Airlines
Find Deal
mié., sep. 17 - sáb., oct. 4

American Airlines flights from Illinois to Philadelphia

Our best American Airlines deals on Illinois to Philadelphia flight tickets
American Airlines
Sep 23
ORD8:35 amChicago O'Hare Intl
2h 01m
PHL11:36 amPhiladelphia
Sep 30
PHL2:15 pmPhiladelphia
2h 28m
ORD3:43 pmChicago O'Hare Intl
$139
Find similar
American Airlines
Sep 17
PIA5:11 pmGreater Peoria
6h 59m
1 stop
PHL1:10 amPhiladelphia
Oct 4
PHL5:15 pmPhiladelphia
7h 08m
1 stop
PIA11:23 pmGreater Peoria
$249
Find similar
American Airlines
Sep 4
PIA5:11 pmGreater Peoria
6h 59m
1 stop
PHL1:10 amPhiladelphia
Sep 7
PHL5:00 amPhiladelphia
6h 53m
1 stop
PIA10:53 amGreater Peoria
$259
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Spirit Airlines flights from Illinois to Philadelphia

Our best Spirit Airlines deals on Illinois to Philadelphia flight tickets
Spirit Airlines
Sep 16
ORD11:57 amChicago O'Hare Intl
10h 50m
1 stop
PHL11:47 pmPhiladelphia
Sep 17
PHL5:00 amPhiladelphia
13h 39m
1 stop
ORD5:39 pmChicago O'Hare Intl
$165
Find similar
Spirit Airlines
Sep 15
ORD6:44 pmChicago O'Hare Intl
14h 02m
1 stop
PHL9:46 amPhiladelphia
Sep 17
PHL5:00 amPhiladelphia
13h 39m
1 stop
ORD5:39 pmChicago O'Hare Intl
$173
Find similar
Spirit Airlines
Sep 20
ORD11:57 amChicago O'Hare Intl
10h 50m
1 stop
PHL11:47 pmPhiladelphia
Sep 23
PHL5:00 amPhiladelphia
6h 52m
1 stop
ORD10:52 amChicago O'Hare Intl
$177
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Philadelphia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated agosto 21, 2025.
Use the filters below to find and compare flights from Illinois to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

sáb. 10/18

2:45 pm-6:00 pm

Nonstop2h 15m

Philadelphia

jue. 10/23

4:10 pm-5:40 pm

Nonstop2h 30m

$127

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

jue. 10/9

6:50 pm-10:10 pm

Nonstop2h 20m

Philadelphia

lun. 10/13

4:10 pm-5:40 pm

Nonstop2h 30m

$128

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

sáb. 10/18

2:45 pm-6:00 pm

Nonstop2h 15m

Philadelphia

lun. 10/20

11:36 am-3:56 pm

1 stop5h 20m

$132

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

mar. 10/21

10:20 am-1:15 pm

Nonstop1h 55m

Philadelphia

mar. 10/21

6:05 pm-7:10 pm

Nonstop2h 05m

$139

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

mar. 9/23

8:35 am-11:36 am

Nonstop2h 01m

Philadelphia

mar. 9/30

2:15 pm-3:43 pm

Nonstop2h 28m

$139

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

mié. 9/17

11:57 am-11:47 pm

1 stop10h 50m

Philadelphia

dom. 9/21

10:21 am-11:58 am

Nonstop2h 37m

$141

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

mar. 9/16

11:05 am-2:17 pm

Nonstop2h 12m

Philadelphia

mar. 9/23

10:10 am-11:32 am

Nonstop2h 22m

$154

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

jue. 10/2

7:30 am-10:39 am

Nonstop2h 09m

Philadelphia

sáb. 10/4

6:30 am-7:52 am

Nonstop2h 22m

$158

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

lun. 9/22

6:55 pm-9:55 pm

Nonstop2h 00m

Philadelphia

mar. 9/23

3:20 pm-4:25 pm

Nonstop2h 05m

$178

PeoriaPhiladelphia

PIA - PHL

PIAPHL

Greater Peoria

mié. 9/17

5:11 pm-1:10 am

1 stop6h 59m

Philadelphia

sáb. 10/4

5:15 pm-11:23 pm

1 stop7h 08m

$249

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Philadelphia from

How to get the cheapest flight ticket from Illinois to Philadelphia

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

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from Illinois is in September. Flight prices, which tend to average around $136, are often lower during this time because this is during the off-season. The month of October is another great option to travel to Philadelphia, with average flight prices from Illinois averaging around $159.

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

The cheapest day to depart from Illinois to Philadelphia is on a Friday. Travelers who choose to depart for Philadelphia on a Friday will often find tickets for as low as $256. On the other hand, Sunday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $384.

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

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Illinois to Philadelphia in the evening for as low as $235. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is at noon when prices are around $382.

What is the cheapest Illinois to Philadelphia flight route?

Fly from Chicago Midway to Philadelphia for the best Illinois - Philadelphia flight prices

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

You are more likely to see cheaper flights to Philadelphia from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $264 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Illinois for as low as $195 on momondo.

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

There are 4 cabin classes available to choose from on Illinois to Philadelphia 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 Illinois to Philadelphia flights?

No. A direct flight is the cheapest option for a flight between Illinois to Philadelphia.

Cheap Illinois to Philadelphia flight deals and tips

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

Best Price Found

$110

Fastest flight time

1h 50m

Direct flights

Every day

Airports in Philadelphia

1 airport
The best one-way flight to Philadelphia from Illinois in the past 72 hours is $110. The best round-trip flight deal from Illinois to Philadelphia found on momondo in the last 72 hours is $159.
The fastest flight from Illinois to Philadelphia takes 1h 50m
Direct flights go from Illinois to Philadelphia every day.
There is 1 airport near Philadelphia: Philadelphia (PHL)
Search flight deals

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

    Prices for flights from Illinois to Philadelphia Airport refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Philadelphia Airport.

  • What documentation or ID do you need to fly to Philadelphia Airport?

    The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to Philadelphia?

Best airlines flying from Illinois to Philadelphia

Compare and see reviews for airlines that fly from Illinois to Philadelphia with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $62Free CancellationRating
5.8
3,207 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $63Free CancellationRating
6.3
8,035 reviews
Search Spirit Airlines flights
DeltaPriceFrom $108Free CancellationRating
7.9
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $146Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
American AirlinesPriceFrom $154Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $168Free CancellationRating
8.0
4,245 reviews
Search Southwest flights

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Cape May
Rehoboth Beach
Ocean City
Wildwood Crest
King of Prussia
Reading
Dewey Beach
Newark
North Wildwood
Cherry Hill
Lewes
Dover
Avalon
Stone Harbor
Vineland
Exton
Essington
Pottstown
New Castle

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Philadelphia. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Philadelphia from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Philadelphia.

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

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

An easier way to manage your Philadelphia 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.
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