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Cheap flights from Philadelphia to Illinois from $68

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 1/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Philadelphia to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:42 pm - 2:22 pmPHL-ORD
2h 40mnonstop
Frontier Logo
7:30 am - 2:55 pmORD-PHL
30h 25m1 stop
$102Frontier
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Thu, Jan 8 - Sun, Jan 11
Multiple Airlines Logo
10:22 am - 6:36 pmPHL-ORD
9h 14m1 stop
Multiple Airlines Logo
3:32 pm - 6:47 pmORD-PHL
2h 15mnonstop
$103Multiple Airlines
Find Deal
Thu, Dec 11 - Thu, Jan 8
Southwest Logo
6:15 pm - 7:25 pmPHL-MDW
2h 10mnonstop
Southwest Logo
8:10 am - 11:05 amMDW-PHL
1h 55mnonstop
$139Southwest
Find Deal
Wed, Dec 24 - Wed, Dec 31
Southwest Logo
12:15 pm - 1:30 pmPHL-MDW
2h 15mnonstop
Southwest Logo
9:45 am - 12:40 pmMDW-PHL
1h 55mnonstop
$148Southwest
Find Deal
Fri, Jan 9 - Sat, Jan 10
Delta Logo
4:59 pm - 10:33 pmPHL-MLI
6h 34m1 stop
Delta Logo
5:20 pm - 12:21 amMLI-PHL
6h 01m1 stop
$249Delta
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Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
1:15 pm - 4:40 pmPHL-PIA
4h 25m1 stop
United Airlines Logo
3:30 pm - 9:10 pmPIA-PHL
4h 40m1 stop
$279United Airlines
Find Deal
Tue, Dec 9 - Sat, Dec 13
United Airlines Logo
6:32 am - 10:09 amPHL-MLI
4h 37m1 stop
United Airlines Logo
6:30 am - 2:24 pmMLI-PHL
6h 54m1 stop
$309United Airlines
Find Deal
Sat, Mar 21 - Thu, Mar 26
American Airlines Logo
10:25 am - 4:59 pmPHL-PIA
7h 34m1 stop
American Airlines Logo
7:39 am - 2:50 pmPIA-PHL
6h 11m1 stop
$319American Airlines
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Tue, Feb 3 - Sat, Feb 7
American Airlines Logo
4:50 pm - 10:23 pmPHL-MLI
6h 33m1 stop
American Airlines Logo
6:00 am - 5:45 pmMLI-PHL
10h 45m2 stops
$339American Airlines
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Tue, Feb 3 - Sat, Feb 7
Delta Logo
8:00 am - 2:55 pmPHL-BMI
7h 55m1 stop
Delta Logo
3:35 pm - 10:01 pmBMI-PHL
5h 26m1 stop
$339Delta
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Tue, Jan 20 - Sat, Jan 24

Frontier flights from Philadelphia to Illinois

Our best Frontier deals on Philadelphia to Illinois flight tickets
Frontier
Jan 8
PHL12:42 pmPhiladelphia
2h 40m
ORD2:22 pmChicago O'Hare Intl
Jan 11
ORD7:30 amChicago O'Hare Intl
30h 25m
1 stop
PHL2:55 pmPhiladelphia
$102
Find similar
Frontier
Dec 8
PHL12:33 pmPhiladelphia
2h 30m
ORD2:03 pmChicago O'Hare Intl
Dec 15
ORD3:23 pmChicago O'Hare Intl
2h 15m
PHL6:38 pmPhiladelphia
$108
Find similar
Frontier
Jan 12
PHL12:42 pmPhiladelphia
2h 40m
ORD2:22 pmChicago O'Hare Intl
Jan 20
ORD3:35 pmChicago O'Hare Intl
8h 07m
1 stop
PHL12:42 amPhiladelphia
$109
Find similar

American Airlines flights from Philadelphia to Illinois

Our best American Airlines deals on Philadelphia to Illinois flight tickets
American Airlines
Jan 28
PHL10:40 amPhiladelphia
2h 42m
ORD12:22 pmChicago O'Hare Intl
Feb 4
ORD8:56 pmChicago O'Hare Intl
1h 59m
PHL11:55 pmPhiladelphia
$140
Find similar
American Airlines
Feb 3
PHL7:17 amPhiladelphia
4h 41m
1 stop
MLI10:58 amMoline Quad-City
Feb 7
MLI6:00 amMoline Quad-City
10h 45m
2 stops
PHL5:45 pmPhiladelphia
$399
Find similar
American Airlines
Nov 29
PHL5:30 amPhiladelphia
4h 45m
1 stop
MLI9:15 amMoline Quad-City
Dec 1
MLI5:37 pmMoline Quad-City
5h 33m
1 stop
PHL12:10 amPhiladelphia
$409
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Illinois 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 November 26, 2025.
Use the filters below to find and compare flights from Philadelphia to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 1/8

12:42 pm-2:22 pm

Nonstop2h 40m

Chicago O'Hare Intl

Sun 1/11

7:30 am-2:55 pm

1 stop30h 25m

$102

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 12/11

10:22 am-6:36 pm

1 stop9h 14m

Chicago O'Hare Intl

Thu 1/8

3:32 pm-6:47 pm

Nonstop2h 15m

$103

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 12/24

6:15 pm-7:25 pm

Nonstop2h 10m

Chicago Midway

Wed 12/31

8:10 am-11:05 am

Nonstop1h 55m

$139

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Fri 1/9

12:15 pm-1:30 pm

Nonstop2h 15m

Chicago Midway

Sat 1/10

9:45 am-12:40 pm

Nonstop1h 55m

$148

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Tue 2/3

4:59 pm-10:33 pm

1 stop6h 34m

Moline Quad-City

Sat 2/7

5:20 pm-12:21 am

1 stop6h 01m

$249

PhiladelphiaPeoria

PHL - PIA

PHLPIA

Philadelphia

Tue 12/9

1:15 pm-4:40 pm

1 stop4h 25m

Greater Peoria

Sat 12/13

3:30 pm-9:10 pm

1 stop4h 40m

$279

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Sat 3/21

6:32 am-10:09 am

1 stop4h 37m

Moline Quad-City

Thu 3/26

6:30 am-2:24 pm

1 stop6h 54m

$309

PhiladelphiaPeoria

PHL - PIA

PHLPIA

Philadelphia

Tue 2/3

10:25 am-4:59 pm

1 stop7h 34m

Greater Peoria

Sat 2/7

7:39 am-2:50 pm

1 stop6h 11m

$319

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Tue 2/3

4:50 pm-10:23 pm

1 stop6h 33m

Moline Quad-City

Sat 2/7

6:00 am-5:45 pm

2 stops10h 45m

$339

PhiladelphiaBloomington

PHL - BMI

PHLBMI

Philadelphia

Tue 1/20

8:00 am-2:55 pm

1 stop7h 55m

Bloomington-Normal

Sat 1/24

3:35 pm-10:01 pm

1 stop5h 26m

$339

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 Illinois from

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

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Philadelphia is in September. Flight prices, which tend to average around $193, 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 September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $212.

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 $332. Flights from Philadelphia to Illinois on a Sunday will generally be more expensive and average around $483. 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 $261. Flights in the morning are often more expensive with an average ticket price of $407.

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 $287 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 $215 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?

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

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

$166

Fastest flight time

2h 05m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from Philadelphia in the past 72 hours is $166. The best round-trip flight deal from Philadelphia to Illinois found on momondo in the last 72 hours is $163.
The fastest flight from Philadelphia to Illinois takes 2h 05m
Direct flights go from Philadelphia to Illinois every day.
There is 1 airport near Illinois: 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?

  • 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?

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
FrontierPriceFrom $77Free CancellationRating
5.8
3,099 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $83Free CancellationRating
6.3
8,158 reviews
Search Spirit Airlines flights
DeltaPriceFrom $118Free CancellationRating
7.9
7,998 reviews
Search Delta flights
United AirlinesPriceFrom $159Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
SouthwestPriceFrom $166Free CancellationRating
8.0
4,254 reviews
Search Southwest flights
American AirlinesPriceFrom $168Free CancellationRating
7.2
11,038 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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