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$56+ Cheap flights from Pittsburgh (PIT) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ORD
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
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Cheap flight deals from Pittsburgh to Illinois

Keep the following information in mind while searching for Pittsburgh to Illinois flight deals. Data was last updated julio 29, 2025.

Round-trip from

$101
(Southwest)

One-way from

$56
(Southwest)

Popular in

March

Cheapest in

August

Average price

$325

Good round-trip deal

$171 or less

Good one-way deal

$104 or less
From Pittsburgh to Illinois
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One-way flight from Pittsburgh to Illinois
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Highest demand for flights based on searches. 1% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Pittsburgh to Illinois.
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Price to beat on a one-way flight from Pittsburgh to Illinois.
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Find flight deals from Pittsburgh to Illinois

Cheapest flights from Pittsburgh to Illinois
Explore the most affordable flight options available from Pittsburgh to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 29, 2025.

This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/261:10 pmPIT - MDW
1 stop7h 10mSouthwest
mié. 8/273:25 pmMDW - PIT
Nonstop1h 20mSouthwest
Deal found 7/28$101
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/263:30 pmPIT - ORD
1 stop7h 00mSouthwest
mié. 8/271:50 pmORD - PIT
1 stop7h 05mSouthwest
Deal found 7/28$111
This American Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/238:23 amPIT - ORD
Nonstop1h 54mAmerican Airlines
dom. 8/248:54 pmORD - PIT
Nonstop1h 50mAmerican Airlines
Deal found 7/29$131
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/266:00 pmPIT - ORD
Nonstop1h 43mUnited Airlines
mié. 8/279:07 pmORD - PIT
Nonstop1h 37mUnited Airlines
Deal found 7/28$149
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/287:35 amPIT - STL
1 stop9h 28mAmerican Airlines
mar. 11/46:00 amSTL - PIT
1 stop8h 33mAmerican Airlines
Deal found 7/27$171
This Mytrip deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/95:18 pmPIT - ORD
2 stops20h 51mSpirit Airlines
jue. 9/1111:13 amORD - PIT
1 stop7h 43mSpirit Airlines
Deal found 7/28$173
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/66:20 amPIT - MDW
1 stop3h 15mDelta
sáb. 9/66:17 pmMDW - PIT
1 stop4h 05mDelta
Deal found 7/29$177
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/66:20 amPIT - ORD
1 stop5h 00mDelta
sáb. 9/65:45 pmORD - PIT
1 stop4h 37mDelta
Deal found 7/29$177
This Trip.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/237:04 amPIT - ORD
Nonstop1h 43mMultiple Airlines
dom. 8/2410:12 amORD - PIT
1 stop9h 54mMultiple Airlines
Deal found 7/29$187
This FlightHub deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/155:40 pmPIT - ORD
1 stop7h 52mFrontier
sáb. 8/307:46 pmORD - PIT
1 stop23h 15mFrontier
Deal found 7/28$195
This Frontier deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/83:49 pmPIT - MDW
1 stop9h 02mFrontier
lun. 8/118:35 amMDW - PIT
1 stop10h 13mFrontier
Deal found 7/28$198
This FlightHub deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/48:33 pmPIT - STL
1 stop28h 14mFrontier
sáb. 8/95:40 pmSTL - PIT
1 stop14h 31mFrontier
Deal found 7/27$215

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated julio 29, 2025.
Use the filters below to find and compare flights from Pittsburgh to Illinois that are best for you.

Fly from

Pittsburgh

Fly to

Illinois

Route

Depart

Return

Price

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

mar. 8/26

1:10 pm-7:20 pm

1 stop7h 10m

Chicago Midway

mié. 8/27

3:25 pm-5:45 pm

Nonstop1h 20m

$101

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

mar. 8/26

3:30 pm-9:30 pm

1 stop7h 00m

Chicago O'Hare Intl

mié. 8/27

1:50 pm-9:55 pm

1 stop7h 05m

$111

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

sáb. 8/23

8:23 am-9:17 am

Nonstop1h 54m

Chicago O'Hare Intl

dom. 8/24

8:54 pm-11:44 pm

Nonstop1h 50m

$131

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

mar. 8/26

6:00 pm-6:43 pm

Nonstop1h 43m

Chicago O'Hare Intl

mié. 8/27

9:07 pm-11:44 pm

Nonstop1h 37m

$149

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

mar. 10/28

7:35 am-4:03 pm

1 stop9h 28m

Lambert-St Louis

mar. 11/4

6:00 am-3:33 pm

1 stop8h 33m

$171

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

mar. 9/9

5:18 pm-1:09 pm

2 stops20h 51m

Chicago O'Hare Intl

jue. 9/11

11:13 am-7:56 pm

1 stop7h 43m

$173

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

sáb. 9/6

6:20 am-8:35 am

1 stop3h 15m

Chicago Midway

sáb. 9/6

6:17 pm-11:22 pm

1 stop4h 05m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

sáb. 9/6

6:20 am-10:20 am

1 stop5h 00m

Chicago O'Hare Intl

sáb. 9/6

5:45 pm-11:22 pm

1 stop4h 37m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

sáb. 8/23

7:04 am-7:47 am

Nonstop1h 43m

Chicago O'Hare Intl

dom. 8/24

10:12 am-9:06 pm

1 stop9h 54m

$187

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

vie. 8/15

5:40 pm-12:32 am

1 stop7h 52m

Chicago O'Hare Intl

sáb. 8/30

7:46 pm-8:01 pm

1 stop23h 15m

$195

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 49 results
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Best time to book a flight from Pittsburgh to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Pittsburgh with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Pittsburgh to Illinois

What is the cheapest month to book a flight from Pittsburgh to Illinois?

Currently, August is the cheapest month in which you can book a flight from Pittsburgh to Illinois (average of $245). Flying from Pittsburgh to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PIT to IL?

Find hourly flight availability from Pittsburgh to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 29, 2025.

When flying from Pittsburgh to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Pittsburgh to Illinois

Explore weekly flight availability from Pittsburgh to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated julio 29, 2025.

The most flights from PIT to USIL are scheduled on a Tuesday (53 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (13 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated julio 29, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Pittsburgh to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,979 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,896 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,913 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Pittsburgh to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Pittsburgh to Illinois?

    Located just 13.5 mi from the city center, Pittsburgh (PIT) is the airport most travelers will use when flying to Illinois from Pittsburgh.

  • What are the cheapest airlines to fly from Pittsburgh to Illinois one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $56. United Airlines flights start at $76 while deals on Spirit Airlines start at $85 one-way.

  • What are the most popular routes from Pittsburgh to Illinois?

    The most popular flight routes from Pittsburgh to Illinois are Pittsburgh - Chicago O'Hare Intl, Pittsburgh - Chicago Midway and Pittsburgh - Lambert-St Louis.

  • What are the most reliable airlines from Pittsburgh to Illinois?

    Before booking your flight to Illinois from Pittsburgh, check out the most reliable airlines to get you to your destination on time: GoJet (100%), Avianca (100%), Copa Airlines( 94%).

  • What are the cheapest flights from Pittsburgh to Illinois?

    Looking at all options, your cheapest flight can be booked for $75. While the most popular route (Pittsburgh - Chicago O'Hare Intl) can be booked for $91 on average our data indicates $1,631 when flying from Pittsburgh to Illinois.

  • Can I find deals for flights from Pittsburgh to Illinois that include hotel bookings?

    Yes. In addition to deals on Pittsburgh to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pittsburgh to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pittsburgh to Illinois.

  • Can I find deals for business class flights from Pittsburgh to Illinois?

    Yes. Cheapflights offers flight deals from Pittsburgh to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Pittsburgh to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Pittsburgh to Illinois (average of $245). Flying from Pittsburgh to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Pittsburgh to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Pittsburgh to Illinois

Discover the top 3 airlines that operate flights from Pittsburgh to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$97Average$362FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$126Average$313FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$135Average$344FlexibilityNo cancel feeOn-time69%

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