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Cheap flights from Pennsylvania to Illinois from $26

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 9/6. 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 Pennsylvania to Illinois

Cheap round-trip flights

Spirit Airlines Logo
1:19 pm - 10:22 pmLGA-ORD
10h 03m1 stop
Spirit Airlines Logo
4:35 pm - 7:41 pmORD-LGA
2h 06mnonstop
$66Spirit Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 6
Spirit Airlines Logo
3:12 pm - 4:50 pmLGA-ORD
2h 38mnonstop
Spirit Airlines Logo
10:27 am - 11:03 pmORD-LGA
11h 36m1 stop
$69Spirit Airlines
Find Deal
Sat, Sep 6 - Tue, Sep 9
Frontier Logo
11:00 am - 12:45 pmJFK-ORD
2h 45mnonstop
Frontier Logo
6:40 am - 10:03 amORD-JFK
2h 23mnonstop
$96Frontier
Find Deal
Wed, Oct 15 - Sat, Oct 25
Frontier Logo
10:00 pm - 11:25 pmEWR-MDW
2h 25mnonstop
Frontier Logo
5:56 pm - 9:00 pmMDW-EWR
2h 04mnonstop
$97Frontier
Find Deal
Tue, Oct 28 - Tue, Nov 4
Southwest Logo
6:00 am - 7:20 amLGA-MDW
2h 20mnonstop
Southwest Logo
7:05 pm - 10:15 pmMDW-LGA
2h 10mnonstop
$137Southwest
Find Deal
Tue, Sep 2 - Wed, Sep 3
American Airlines Logo
7:33 pm - 9:21 pmEWR-ORD
2h 48mnonstop
American Airlines Logo
3:17 pm - 6:30 pmORD-EWR
2h 13mnonstop
$142American Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 6
Southwest Logo
9:35 pm - 10:55 pmLGA-MDW
2h 20mnonstop
Southwest Logo
5:55 pm - 9:10 pmMDW-LGA
2h 15mnonstop
$147Southwest
Find Deal
Tue, Sep 2 - Tue, Sep 9
American Airlines Logo
10:49 am - 12:24 pmEWR-ORD
2h 35mnonstop
American Airlines Logo
3:42 pm - 6:59 pmORD-EWR
2h 17mnonstop
$154American Airlines
Find Deal
Wed, Sep 17 - Wed, Sep 17
United Airlines Logo
9:00 am - 10:35 amEWR-ORD
2h 35mnonstop
United Airlines Logo
8:45 am - 11:59 amORD-EWR
2h 14mnonstop
$162United Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
United Airlines Logo
9:44 pm - 11:25 pmEWR-ORD
2h 41mnonstop
United Airlines Logo
9:23 pm - 12:45 amORD-EWR
2h 22mnonstop
$173United Airlines
Find Deal
Wed, Sep 24 - Sun, Sep 28

Delta flights from Pennsylvania to Illinois

Our best Delta deals on Pennsylvania to Illinois flight tickets
Delta
Sep 3
JFK8:00 amNew York John F Kennedy Intl
2h 55m
ORD9:55 amChicago O'Hare Intl
Sep 6
ORD6:20 pmChicago O'Hare Intl
2h 43m
JFK10:03 pmNew York John F Kennedy Intl
$142
Find similar
Delta
Sep 2
JFK7:29 pmNew York John F Kennedy Intl
3h 18m
ORD9:47 pmChicago O'Hare Intl
Sep 9
ORD1:25 pmChicago O'Hare Intl
2h 35m
JFK5:00 pmNew York John F Kennedy Intl
$147
Find similar
Delta
Sep 6
JFK3:29 pmNew York John F Kennedy Intl
3h 08m
ORD5:37 pmChicago O'Hare Intl
Sep 8
ORD7:00 amChicago O'Hare Intl
2h 23m
JFK10:23 amNew York John F Kennedy Intl
$157
Find similar

Spirit Airlines flights from Pennsylvania to Illinois

Our best Spirit Airlines deals on Pennsylvania to Illinois flight tickets
Spirit Airlines
Aug 30
LGA1:19 pmNew York LaGuardia
10h 03m
1 stop
ORD10:22 pmChicago O'Hare Intl
Sep 6
ORD4:35 pmChicago O'Hare Intl
2h 06m
LGA7:41 pmNew York LaGuardia
$66
Find similar
Spirit Airlines
Sep 6
LGA3:12 pmNew York LaGuardia
2h 38m
ORD4:50 pmChicago O'Hare Intl
Sep 9
ORD10:27 amChicago O'Hare Intl
11h 36m
1 stop
LGA11:03 pmNew York LaGuardia
$69
Find similar
Spirit Airlines
Sep 3
LGA7:55 pmNew York LaGuardia
14h 23m
1 stop
ORD9:18 amChicago O'Hare Intl
Sep 6
ORD4:35 pmChicago O'Hare Intl
2h 06m
LGA7:41 pmNew York LaGuardia
$71
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 August 3, 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

LGA - ORD

LGAORD

New York LaGuardia

Sat 8/30

1:19 pm-10:22 pm

1 stop10h 03m

Chicago O'Hare Intl

Sat 9/6

4:35 pm-7:41 pm

Nonstop2h 06m

$66

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Sat 9/6

3:12 pm-4:50 pm

Nonstop2h 38m

Chicago O'Hare Intl

Tue 9/9

10:27 am-11:03 pm

1 stop11h 36m

$69

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Wed 10/15

11:00 am-12:45 pm

Nonstop2h 45m

Chicago O'Hare Intl

Sat 10/25

6:40 am-10:03 am

Nonstop2h 23m

$96

NewarkChicago

EWR - MDW

EWRMDW

Newark

Tue 10/28

10:00 pm-11:25 pm

Nonstop2h 25m

Chicago Midway

Tue 11/4

5:56 pm-9:00 pm

Nonstop2h 04m

$97

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Tue 9/2

6:00 am-7:20 am

Nonstop2h 20m

Chicago Midway

Wed 9/3

7:05 pm-10:15 pm

Nonstop2h 10m

$137

NewarkChicago

EWR - ORD

EWRORD

Newark

Sat 8/30

7:33 pm-9:21 pm

Nonstop2h 48m

Chicago O'Hare Intl

Sat 9/6

3:17 pm-6:30 pm

Nonstop2h 13m

$142

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Tue 9/2

9:35 pm-10:55 pm

Nonstop2h 20m

Chicago Midway

Tue 9/9

5:55 pm-9:10 pm

Nonstop2h 15m

$147

NewarkChicago

EWR - ORD

EWRORD

Newark

Wed 9/17

10:49 am-12:24 pm

Nonstop2h 35m

Chicago O'Hare Intl

Wed 9/17

3:42 pm-6:59 pm

Nonstop2h 17m

$154

NewarkChicago

EWR - ORD

EWRORD

Newark

Wed 9/3

9:00 am-10:35 am

Nonstop2h 35m

Chicago O'Hare Intl

Sat 9/6

8:45 am-11:59 am

Nonstop2h 14m

$162

NewarkChicago

EWR - ORD

EWRORD

Newark

Wed 9/24

9:44 pm-11:25 pm

Nonstop2h 41m

Chicago O'Hare Intl

Sun 9/28

9:23 pm-12:45 am

Nonstop2h 22m

$173

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 $129, 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 October is also cheap. Prices for this month can be found on momondo for an average of $177.

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 $306. Flights from Pennsylvania to Illinois on a Sunday will generally be more expensive and average around $458. 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 $229. Flights in the morning are often more expensive with an average ticket price of $383.

What is the cheapest Pennsylvania to Illinois flight route?

Fly from Pittsburgh to Chicago Midway 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 $274 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 $212 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.

  • 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 $52Free CancellationRating
5.8
3,237 reviews
Search Frontier flights
American AirlinesPriceFrom $97Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $118Free CancellationRating
8.0
7,985 reviews
Search Delta flights
SouthwestPriceFrom $126Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $135Free CancellationRating
7.4
8,905 reviews
Search United Airlines 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.

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