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Cheap flights from Pittsburgh to Illinois from $84

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Pittsburgh to Illinois departing on 4/25. 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 Pittsburgh to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
8:25 am - 8:55 am
PIT
-
MDW
1h 30mnonstop
Southwest Logo
6:55 pm - 9:20 pm
MDW
-
PIT
1h 25mnonstop
$177Southwest
Sat, Apr 18 - Mon, Apr 20
United Airlines Logo
7:00 am - 7:49 am
PIT
-
ORD
1h 49mnonstop
United Airlines Logo
9:20 pm - 11:53 pm
ORD
-
PIT
1h 33mnonstop
$177United Airlines
Thu, Apr 23 - Thu, Apr 23
Spirit Airlines Logo
6:15 pm - 12:24 am
PIT
-
ORD
7h 09m
1 stop
Spirit Airlines Logo
5:05 am - 5:20 pm
ORD
-
PIT
11h 15m
1 stop
$183Spirit Airlines
Thu, Apr 23 - Sat, Apr 25
Frontier Logo
8:15 pm - 11:13 pm
PIT
-
ORD
27h 58m
1 stop
Frontier Logo
3:55 pm - 7:20 pm
ORD
-
PIT
26h 25m
1 stop
$184Frontier
Wed, May 13 - Tue, May 19
Southwest Logo
10:05 am - 1:10 pm
PIT
-
MDW
4h 05m
1 stop
Southwest Logo
7:40 am - 10:00 am
MDW
-
PIT
1h 20mnonstop
$187Southwest
Sat, Apr 18 - Mon, Apr 20
Southwest Logo
6:00 am - 2:40 pm
PIT
-
MDW
9h 40m
2 stops
Southwest Logo
12:50 pm - 3:15 pm
MDW
-
PIT
1h 25mnonstop
$192Southwest
Sat, Apr 18 - Mon, Apr 20
United Airlines Logo
6:00 pm - 9:52 pm
PIT
-
STL
4h 52m
1 stop
United Airlines Logo
9:10 am - 3:26 pm
STL
-
PIT
5h 16m
1 stop
$196United Airlines
Wed, Apr 22 - Wed, Apr 29
Frontier Logo
7:00 pm - 11:19 pm
PIT
-
STL
29h 19m
1 stop
Frontier Logo
4:59 pm - 8:29 am
STL
-
PIT
14h 30m
1 stop
$217Frontier
Mon, Apr 13 - Thu, Apr 16
American Airlines Logo
7:11 pm - 11:54 pm
PIT
-
EVV
5h 43m
1 stop
American Airlines Logo
6:23 pm - 11:50 pm
EVV
-
PIT
4h 27m
1 stop
$329American Airlines
Sat, May 16 - Sun, May 17
American Airlines Logo
6:33 am - 12:27 pm
PIT
-
MLI
6h 54m
1 stop
American Airlines Logo
5:15 am - 11:04 am
MLI
-
PIT
4h 49m
1 stop
$339American Airlines
Wed, Apr 8 - Sun, Apr 12

Spirit Airlines flights from Pittsburgh to Illinois

Our best Spirit Airlines deals on Pittsburgh to Illinois flight tickets
Spirit Airlines
Apr 23
PIT6:15 pmPittsburgh
7h 09m
1 stop
ORD12:24 amChicago O'Hare Intl
Apr 25
ORD5:05 amChicago O'Hare Intl
11h 15m
1 stop
PIT5:20 pmPittsburgh
$183
Spirit Airlines
Apr 13
PIT10:45 amPittsburgh
25h 32m
1 stop
ORD11:17 amChicago O'Hare Intl
Apr 15
ORD5:05 amChicago O'Hare Intl
17h 54m
1 stop
PIT11:59 pmPittsburgh
$210
Spirit Airlines
Apr 8
PIT10:45 amPittsburgh
13h 32m
1 stop
ORD11:17 pmChicago O'Hare Intl
Apr 25
ORD5:05 amChicago O'Hare Intl
11h 15m
1 stop
PIT5:20 pmPittsburgh
$212

United Airlines flights from Pittsburgh to Illinois

Our best United Airlines deals on Pittsburgh to Illinois flight tickets
United Airlines
Apr 23
PIT7:00 amPittsburgh
1h 49m
ORD7:49 amChicago O'Hare Intl
Apr 23
ORD9:20 pmChicago O'Hare Intl
1h 33m
PIT11:53 pmPittsburgh
$177
United Airlines
Apr 22
PIT6:00 pmPittsburgh
4h 52m
1 stop
STL9:52 pmLambert-St Louis
Apr 29
STL9:10 amLambert-St Louis
5h 16m
1 stop
PIT3:26 pmPittsburgh
$196
United Airlines
May 12
PIT7:05 amPittsburgh
1h 50m
ORD7:55 amChicago O'Hare Intl
May 13
ORD7:16 amChicago O'Hare Intl
1h 40m
PIT9:56 amPittsburgh
$231

momondo Fare Finder

 
Customize your flight search to find flights from Pittsburgh 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 March 28, 2026.
Use the filters below to find and compare flights from Pittsburgh to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Sat 4/18

8:25 am-8:55 am

Nonstop1h 30m

Chicago Midway

Mon 4/20

6:55 pm-9:20 pm

Nonstop1h 25m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 4/23

7:00 am-7:49 am

Nonstop1h 49m

Chicago O'Hare Intl

Thu 4/23

9:20 pm-11:53 pm

Nonstop1h 33m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 4/23

6:15 pm-12:24 am

1 stop7h 09m

Chicago O'Hare Intl

Sat 4/25

5:05 am-5:20 pm

1 stop11h 15m

$183

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Wed 5/13

8:15 pm-11:13 pm

1 stop27h 58m

Chicago O'Hare Intl

Tue 5/19

3:55 pm-7:20 pm

1 stop26h 25m

$184

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Sat 4/18

10:05 am-1:10 pm

1 stop4h 05m

Chicago Midway

Mon 4/20

7:40 am-10:00 am

Nonstop1h 20m

$187

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Sat 4/18

6:00 am-2:40 pm

2 stops9h 40m

Chicago Midway

Mon 4/20

12:50 pm-3:15 pm

Nonstop1h 25m

$192

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 4/22

6:00 pm-9:52 pm

1 stop4h 52m

Lambert-St Louis

Wed 4/29

9:10 am-3:26 pm

1 stop5h 16m

$196

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 4/13

7:00 pm-11:19 pm

1 stop29h 19m

Lambert-St Louis

Thu 4/16

4:59 pm-8:29 am

1 stop14h 30m

$217

PittsburghEvansville

PIT - EVV

PITEVV

Pittsburgh

Sat 5/16

7:11 pm-11:54 pm

1 stop5h 43m

Evansville Dress Regional

Sun 5/17

6:23 pm-11:50 pm

1 stop4h 27m

$329

PittsburghMoline

PIT - MLI

PITMLI

Pittsburgh

Wed 4/8

6:33 am-12:27 pm

1 stop6h 54m

Moline Quad-City

Sun 4/12

5:15 am-11:04 am

1 stop4h 49m

$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 Pittsburgh 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 Pittsburgh is in August. Flight prices, which tend to average around $196, 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 August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $228.

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

The cheapest day to depart from Pittsburgh to Illinois is on a Friday when prices can be found for as low as $401. Flights from Pittsburgh to Illinois on a Monday will generally be more expensive and average around $544. 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 Pittsburgh to Illinois during this time can be as low as $386. Flights at noon are often more expensive with an average ticket price of $596.

What is the cheapest Pittsburgh to Illinois flight route?

Fly from Pittsburgh to Chicago O'Hare Intl for the best Pittsburgh - 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 Pittsburgh when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $298 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Pittsburgh for as low as $138 on momondo.

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

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

Cheap Pittsburgh to Illinois flight deals and tips

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

Best Price Found

$199

Fastest flight time

1h 20m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Pittsburgh in the past 72 hours is $199. The best round-trip flight deal from Pittsburgh to Illinois found on momondo in the last 72 hours is $318.
The fastest flight from Pittsburgh to Illinois takes 1h 20m
Direct flights go from Pittsburgh to Illinois every day.
There are 98 airports in Illinois. From Pittsburgh there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL).
Search flight deals

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

    Prices for flights from Pittsburgh Airport to Illinois refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Pittsburgh 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 Pittsburgh to Illinois?

Best airlines flying from Pittsburgh to Illinois

Compare and see reviews for airlines that fly from Pittsburgh to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $92Free CancellationRating
7.1
11,520 reviews
Search American Airlines flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,333 reviews
Search Southwest flights
United AirlinesPriceFrom $134Free CancellationRating
7.4
9,499 reviews
Search United Airlines flights

Why use momondo?

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

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

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

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

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

Once you have performed a search for Pittsburgh to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Illinois from Pittsburgh are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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