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Cheap flights from Pennsylvania to Illinois from $51

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Pennsylvania to Illinois departing on 5/12. 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 Pennsylvania to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:03 am - 1:03 pm
JFK
-
ORD
3h 00mnonstop
Frontier Logo
6:40 am - 10:04 am
ORD
-
JFK
2h 24mnonstop
$83Frontier
Fri, Feb 20 - Sun, Feb 22
Spirit Airlines Logo
7:30 am - 9:12 am
LGA
-
ORD
2h 42mnonstop
Spirit Airlines Logo
5:53 pm - 8:59 pm
ORD
-
LGA
2h 06mnonstop
$83Spirit Airlines
Thu, Jan 8 - Sat, Jan 10
Frontier Logo
11:03 am - 1:03 pm
JFK
-
ORD
3h 00mnonstop
Frontier Logo
6:40 am - 10:04 am
ORD
-
JFK
2h 24mnonstop
$84Frontier
Sun, Feb 22 - Fri, Feb 27
Spirit Airlines Logo
7:30 am - 9:12 am
LGA
-
ORD
2h 42mnonstop
Spirit Airlines Logo
5:53 pm - 8:59 pm
ORD
-
LGA
2h 06mnonstop
$84Spirit Airlines
Fri, Jan 16 - Mon, Jan 19
Frontier Logo
1:00 pm - 2:57 pm
JFK
-
ORD
2h 57mnonstop
Frontier Logo
12:00 pm - 3:24 pm
ORD
-
JFK
2h 24mnonstop
$85Frontier
Fri, Jan 9 - Fri, Jan 16
Spirit Airlines Logo
7:30 am - 9:12 am
LGA
-
ORD
2h 42mnonstop
Spirit Airlines Logo
5:58 pm - 8:59 pm
ORD
-
LGA
2h 01mnonstop
$85Spirit Airlines
Thu, Feb 12 - Mon, Feb 16
Southwest Logo
6:00 am - 7:40 am
LGA
-
MDW
2h 40mnonstop
Southwest Logo
7:15 pm - 10:20 pm
MDW
-
LGA
2h 05mnonstop
$139Southwest
Thu, Jan 15 - Sun, Jan 18
Southwest Logo
6:00 am - 7:40 am
LGA
-
MDW
2h 40mnonstop
Southwest Logo
5:55 pm - 9:00 pm
MDW
-
LGA
2h 05mnonstop
$148Southwest
Fri, Jan 16 - Tue, Jan 20
JetBlue Logo
1:00 pm - 5:43 pm
DCA
-
ORD
5h 43m1 stop
JetBlue Logo
7:45 am - 2:29 pm
ORD
-
DCA
5h 44m1 stop
$172JetBlue
Thu, Jan 15 - Sun, Jan 18
JetBlue Logo
11:55 am - 5:43 pm
DCA
-
ORD
6h 48m1 stop
JetBlue Logo
7:45 am - 4:19 pm
ORD
-
DCA
7h 34m1 stop
$176JetBlue
Thu, Jan 15 - Sun, Jan 18

Delta flights from Pennsylvania to Illinois

Our best Delta deals on Pennsylvania to Illinois flight tickets
Delta
Jan 15
JFK7:50 amNew York John F Kennedy Intl
2h 59m
ORD9:49 amChicago O'Hare Intl
Jan 18
ORD1:57 pmChicago O'Hare Intl
2h 33m
JFK5:30 pmNew York John F Kennedy Intl
$139
Find similar
Delta
Jan 15
JFK7:50 amNew York John F Kennedy Intl
2h 59m
ORD9:49 amChicago O'Hare Intl
Jan 18
ORD7:01 amChicago O'Hare Intl
2h 29m
JFK10:30 amNew York John F Kennedy Intl
$140
Find similar
Delta
Dec 25
PHL8:08 amPhiladelphia
5h 46m
1 stop
ORD12:54 pmChicago O'Hare Intl
Dec 31
ORD6:02 pmChicago O'Hare Intl
4h 15m
1 stop
PHL11:17 pmPhiladelphia
$177
Find similar

Spirit Airlines flights from Pennsylvania to Illinois

Our best Spirit Airlines deals on Pennsylvania to Illinois flight tickets
Spirit Airlines
Jan 8
LGA7:30 amNew York LaGuardia
2h 42m
ORD9:12 amChicago O'Hare Intl
Jan 10
ORD5:53 pmChicago O'Hare Intl
2h 06m
LGA8:59 pmNew York LaGuardia
$83
Find similar
Spirit Airlines
Jan 16
LGA7:30 amNew York LaGuardia
2h 42m
ORD9:12 amChicago O'Hare Intl
Jan 19
ORD5:53 pmChicago O'Hare Intl
2h 06m
LGA8:59 pmNew York LaGuardia
$84
Find similar
Spirit Airlines
Feb 12
LGA7:30 amNew York LaGuardia
2h 42m
ORD9:12 amChicago O'Hare Intl
Feb 16
ORD5:58 pmChicago O'Hare Intl
2h 01m
LGA8:59 pmNew York LaGuardia
$85
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Pennsylvania 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 December 15, 2025.
Use the filters below to find and compare flights from Pennsylvania to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Fri 2/20

11:03 am-1:03 pm

Nonstop3h 00m

Chicago O'Hare Intl

Sun 2/22

6:40 am-10:04 am

Nonstop2h 24m

$83

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 1/8

7:30 am-9:12 am

Nonstop2h 42m

Chicago O'Hare Intl

Sat 1/10

5:53 pm-8:59 pm

Nonstop2h 06m

$83

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Sun 2/22

11:03 am-1:03 pm

Nonstop3h 00m

Chicago O'Hare Intl

Fri 2/27

6:40 am-10:04 am

Nonstop2h 24m

$84

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 1/16

7:30 am-9:12 am

Nonstop2h 42m

Chicago O'Hare Intl

Mon 1/19

5:53 pm-8:59 pm

Nonstop2h 06m

$84

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Fri 1/9

1:00 pm-2:57 pm

Nonstop2h 57m

Chicago O'Hare Intl

Fri 1/16

12:00 pm-3:24 pm

Nonstop2h 24m

$85

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 2/12

7:30 am-9:12 am

Nonstop2h 42m

Chicago O'Hare Intl

Mon 2/16

5:58 pm-8:59 pm

Nonstop2h 01m

$85

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Thu 1/15

6:00 am-7:40 am

Nonstop2h 40m

Chicago Midway

Sun 1/18

7:15 pm-10:20 pm

Nonstop2h 05m

$139

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Fri 1/16

6:00 am-7:40 am

Nonstop2h 40m

Chicago Midway

Tue 1/20

5:55 pm-9:00 pm

Nonstop2h 05m

$148

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/15

1:00 pm-5:43 pm

1 stop5h 43m

Chicago O'Hare Intl

Sun 1/18

7:45 am-2:29 pm

1 stop5h 44m

$172

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/15

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Sun 1/18

7:45 am-4:19 pm

1 stop7h 34m

$176

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 Pennsylvania 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 Pennsylvania 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 $207.

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

The cheapest day to depart from Pennsylvania to Illinois is on a Friday when prices can be found for as low as $328. Flights from Pennsylvania to Illinois on a Sunday will generally be more expensive and average around $493. 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 Pennsylvania to Illinois during this time can be as low as $271. Flights at noon are often more expensive with an average ticket price of $411.

What is the cheapest Pennsylvania to Illinois flight route?

Fly from Philadelphia to Chicago O'Hare Intl for the best Pennsylvania - 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 Pennsylvania when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $283 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Pennsylvania for as low as $220 on momondo.

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

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

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

Cheap Pennsylvania to Illinois flight deals and tips

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

Best Price Found

$166

Fastest flight time

1h 25m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Pennsylvania in the past 72 hours is $166. The best round-trip flight deal from Pennsylvania to Illinois found on momondo in the last 72 hours is $227.
The fastest flight from Pennsylvania to Illinois takes 1h 25m
Direct flights go from Pennsylvania to Illinois every day.
There are 98 airports in Illinois. From Pennsylvania there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

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

    Prices for flights from Pennsylvania to Illinois refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Pennsylvania to Illinois.

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

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Pennsylvania to Illinois

Compare and see reviews for airlines that fly from Pennsylvania to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $77Free CancellationRating
5.8
3,080 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $83Free CancellationRating
6.3
8,187 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $91Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
SouthwestPriceFrom $97Free CancellationRating
7.9
4,249 reviews
Search Southwest flights
United AirlinesPriceFrom $105Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
DeltaPriceFrom $118Free CancellationRating
7.9
8,008 reviews
Search Delta flights

Why use momondo?

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

It is quick and easy to find Pennsylvania to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

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

Yes. momondo enables you to select and highlight flights to Illinois from Pennsylvania with this policy.

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

Once all potential Pennsylvania 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 Pennsylvania to Illinois right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Pennsylvania to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Illinois trip

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Find better results for your trip to Illinois

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