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Cheap flights from Pittsburgh to Illinois from $56

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 1/14. 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 Pittsburgh to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
12:35 pm - 7:05 pm
PIT
-
STL
7h 30m1 stop
Southwest Logo
8:20 am - 3:40 pm
STL
-
PIT
6h 20m1 stop
$164Southwest
Mon, Jan 26 - Tue, Jan 27
Multiple Airlines Logo
5:32 am - 10:33 pm
PIT
-
STL
18h 01m1 stop
Multiple Airlines Logo
5:11 pm - 11:44 pm
STL
-
PIT
29h 33m2 stops
$173Multiple Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
8:56 am - 12:29 pm
PIT
-
STL
4h 33m1 stop
United Airlines Logo
8:30 am - 2:04 pm
STL
-
PIT
4h 34m1 stop
$191United Airlines
Thu, Jan 8 - Thu, Jan 15
United Airlines Logo
8:56 am - 9:55 am
PIT
-
ORD
1h 59mnonstop
United Airlines Logo
6:04 pm - 8:41 pm
ORD
-
PIT
1h 37mnonstop
$201United Airlines
Tue, Jan 20 - Thu, Jan 22
American Airlines Logo
6:25 am - 7:29 am
PIT
-
ORD
2h 04mnonstop
American Airlines Logo
3:30 pm - 6:10 pm
ORD
-
PIT
1h 40mnonstop
$203American Airlines
Sat, Jan 17 - Sun, Jan 18
Delta Logo
6:20 am - 8:49 am
PIT
-
MDW
3h 29m1 stop
Delta Logo
6:14 pm - 11:42 pm
MDW
-
PIT
4h 28m1 stop
$206Delta
Thu, Dec 25 - Tue, Jan 6
Delta Logo
6:20 am - 9:01 am
PIT
-
ORD
3h 41m1 stop
Delta Logo
9:35 am - 6:00 pm
ORD
-
PIT
7h 25m1 stop
$206Delta
Thu, Dec 25 - Tue, Jan 6
Spirit Airlines Logo
6:00 am - 5:52 pm
PIT
-
ORD
12h 52m2 stops
Spirit Airlines Logo
8:43 pm - 9:40 am
ORD
-
PIT
11h 57m1 stop
$207Spirit Airlines
Sun, Jan 18 - Mon, Jan 19
Spirit Airlines Logo
8:00 am - 8:04 pm
PIT
-
ORD
37h 04m3 stops
Spirit Airlines Logo
5:32 pm - 9:40 am
ORD
-
PIT
15h 08m1 stop
$209Spirit Airlines
Tue, Jan 6 - Tue, Jan 13
American Airlines Logo
9:30 am - 1:22 pm
PIT
-
ORD
4h 52m1 stop
American Airlines Logo
3:30 pm - 6:10 pm
ORD
-
PIT
1h 40mnonstop
$211American Airlines
Thu, Jan 29 - Mon, Feb 2

Delta flights from Pittsburgh to Illinois

Our best Delta deals on Pittsburgh to Illinois flight tickets
Delta
Dec 25
PIT6:20 amPittsburgh
3h 41m
1 stop
ORD9:01 amChicago O'Hare Intl
Jan 6
ORD9:35 amChicago O'Hare Intl
7h 25m
1 stop
PIT6:00 pmPittsburgh
$206
Find similar
Delta
Jan 15
PIT6:05 amPittsburgh
8h 21m
1 stop
ORD1:26 pmChicago O'Hare Intl
Jan 18
ORD5:30 amChicago O'Hare Intl
5h 20m
1 stop
PIT11:50 amPittsburgh
$223
Find similar
Delta
Jan 19
PIT6:19 amPittsburgh
4h 22m
1 stop
ORD9:41 amChicago O'Hare Intl
Jan 21
ORD9:35 amChicago O'Hare Intl
7h 25m
1 stop
PIT6:00 pmPittsburgh
$230
Find similar

American Airlines flights from Pittsburgh to Illinois

Our best American Airlines deals on Pittsburgh to Illinois flight tickets
American Airlines
Jan 17
PIT6:25 amPittsburgh
2h 04m
ORD7:29 amChicago O'Hare Intl
Jan 18
ORD3:30 pmChicago O'Hare Intl
1h 40m
PIT6:10 pmPittsburgh
$203
Find similar
American Airlines
Jan 29
PIT9:30 amPittsburgh
4h 52m
1 stop
ORD1:22 pmChicago O'Hare Intl
Feb 2
ORD3:30 pmChicago O'Hare Intl
1h 40m
PIT6:10 pmPittsburgh
$211
Find similar
American Airlines
Jan 17
PIT6:25 amPittsburgh
2h 04m
ORD7:29 amChicago O'Hare Intl
Jan 18
ORD12:58 pmChicago O'Hare Intl
4h 16m
1 stop
PIT6:14 pmPittsburgh
$213
Find similar

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 December 11, 2025.
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

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 1/26

12:35 pm-7:05 pm

1 stop7h 30m

Lambert-St Louis

Tue 1/27

8:20 am-3:40 pm

1 stop6h 20m

$164

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 1/8

5:32 am-10:33 pm

1 stop18h 01m

Lambert-St Louis

Mon 1/12

5:11 pm-11:44 pm

2 stops29h 33m

$173

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Thu 1/8

8:56 am-12:29 pm

1 stop4h 33m

Lambert-St Louis

Thu 1/15

8:30 am-2:04 pm

1 stop4h 34m

$191

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 1/20

8:56 am-9:55 am

Nonstop1h 59m

Chicago O'Hare Intl

Thu 1/22

6:04 pm-8:41 pm

Nonstop1h 37m

$201

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Sat 1/17

6:25 am-7:29 am

Nonstop2h 04m

Chicago O'Hare Intl

Sun 1/18

3:30 pm-6:10 pm

Nonstop1h 40m

$203

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Thu 12/25

6:20 am-8:49 am

1 stop3h 29m

Chicago Midway

Tue 1/6

6:14 pm-11:42 pm

1 stop4h 28m

$206

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 12/25

6:20 am-9:01 am

1 stop3h 41m

Chicago O'Hare Intl

Tue 1/6

9:35 am-6:00 pm

1 stop7h 25m

$206

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Sun 1/18

6:00 am-5:52 pm

2 stops12h 52m

Chicago O'Hare Intl

Mon 1/19

8:43 pm-9:40 am

1 stop11h 57m

$207

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 1/6

8:00 am-8:04 pm

3 stops37h 04m

Chicago O'Hare Intl

Tue 1/13

5:32 pm-9:40 am

1 stop15h 08m

$209

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 1/29

9:30 am-1:22 pm

1 stop4h 52m

Chicago O'Hare Intl

Mon 2/2

3:30 pm-6:10 pm

Nonstop1h 40m

$211

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 $197, 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 $227.

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

The cheapest day to depart from Pittsburgh to Illinois is on a Thursday when prices can be found for as low as $423. Flights from Pittsburgh to Illinois on a Monday will generally be more expensive and average around $549. 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 $388. Flights at noon are often more expensive with an average ticket price of $663.

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 $310 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 $188 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.

Can stopping save me money on Pittsburgh to Illinois flights?

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

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

$177

Fastest flight time

1h 30m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Pittsburgh in the past 72 hours is $177. The best round-trip flight deal from Pittsburgh to Illinois found on momondo in the last 72 hours is $337.
The fastest flight from Pittsburgh to Illinois takes 1h 30m
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
7.2
11,050 reviews
Search American Airlines flights
SouthwestPriceFrom $97Free CancellationRating
7.9
4,253 reviews
Search Southwest flights
United AirlinesPriceFrom $106Free CancellationRating
7.4
9,095 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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Sat 1/10
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Find better results for your trip to Illinois

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