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$49+ 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ORD
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$135
(United Airlines)

One-way from

$49
(Southwest)

Popular in

January

Cheapest in

August

Average price

$265

Good round-trip deal

$327 or less

Good one-way deal

$162 or less
Provider with most accurate pricing for Pittsburgh-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Pittsburgh-Chicago (CHI) flights.
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From Pittsburgh to Illinois
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One-way flight from Pittsburgh to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($29 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 April 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 April 24, 2025.

This United Airlines deal was found by Cheapflights users on 4/23. 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.
Mon 5/196:03 pmPIT - ORD
Nonstop1h 51mUnited Airlines
Wed 5/219:20 pmORD - PIT
Nonstop1h 42mUnited Airlines
Deal found 4/23$135
This Southwest deal was found by Cheapflights users on 4/23. 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.
Wed 5/216:45 amPIT - MDW
Nonstop1h 30mSouthwest
Wed 5/286:25 pmMDW - PIT
Nonstop1h 20mSouthwest
Deal found 4/23$138
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Thu 5/158:00 pmPIT - ORD
Nonstop1h 49mAmerican Airlines
Mon 5/197:05 pmORD - PIT
Nonstop1h 37mAmerican Airlines
Deal found 4/22$145
This Southwest deal was found by Cheapflights users on 4/23. 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.
Tue 9/166:00 amPIT - ORD
1 stop6h 50mSouthwest
Sat 9/202:55 pmORD - PIT
1 stop4h 00mSouthwest
Deal found 4/23$171
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Wed 5/2111:28 amPIT - STL
1 stop8h 05mAmerican Airlines
Wed 5/286:00 amSTL - PIT
1 stop8h 45mAmerican Airlines
Deal found 4/23$171
This Delta deal was found by Cheapflights users on 4/23. 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.
Thu 6/56:25 amPIT - MDW
1 stop3h 15mDelta
Mon 6/96:20 pmMDW - PIT
1 stop4h 45mDelta
Deal found 4/23$177
This Delta deal was found by Cheapflights users on 4/23. 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.
Wed 7/26:30 amPIT - ORD
1 stop4h 33mDelta
Wed 7/96:00 amORD - PIT
1 stop4h 44mDelta
Deal found 4/23$177
This Booking.com deal was found by Cheapflights users on 4/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/126:14 pmPIT - STL
1 stop6h 52mFrontier
Thu 5/155:45 pmSTL - PIT
1 stop22h 39mFrontier
Deal found 4/23$180
This CheapOair deal was found by Cheapflights users on 4/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/96:14 pmPIT - ORD
1 stop6h 18mFrontier
Sun 5/114:15 pmORD - PIT
1 stop24h 09mFrontier
Deal found 4/23$181
This CheapOair deal was found by Cheapflights users on 4/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/305:40 pmPIT - MDW
1 stop28h 13mFrontier
Sun 6/19:12 pmMDW - PIT
1 stop19h 48mFrontier
Deal found 4/23$201
This Mytrip deal was found by Cheapflights users on 4/23. 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.
Tue 6/312:31 pmPIT - ORD
2 stops19h 01mSpirit Airlines
Wed 6/49:08 pmORD - PIT
1 stop11h 12mSpirit Airlines
Deal found 4/23$209
This Priceline deal was found by Cheapflights users on 4/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/166:14 pmPIT - ORD
1 stop6h 18mMultiple Airlines
Mon 5/1912:41 pmORD - PIT
1 stop9h 38mMultiple Airlines
Deal found 4/23$213

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 April 24, 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 - ORD

PITORD

Pittsburgh

Mon 5/19

6:03 pm-6:54 pm

Nonstop1h 51m

Chicago O'Hare Intl

Wed 5/21

9:20 pm-12:02 am

Nonstop1h 42m

$135

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Wed 5/21

7:20 pm-7:50 pm

Nonstop1h 30m

Chicago Midway

Wed 5/28

6:25 pm-8:45 pm

Nonstop1h 20m

$138

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 5/15

8:00 pm-8:49 pm

Nonstop1h 49m

Chicago O'Hare Intl

Mon 5/19

7:05 pm-9:42 pm

Nonstop1h 37m

$145

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Fri 5/16

6:14 pm-11:32 pm

1 stop6h 18m

Chicago O'Hare Intl

Sun 5/18

4:15 pm-5:24 pm

1 stop24h 09m

$161

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Wed 5/21

11:28 am-6:33 pm

1 stop8h 05m

Lambert-St Louis

Wed 5/28

6:00 am-3:45 pm

1 stop8h 45m

$171

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Thu 6/5

6:25 am-8:40 am

1 stop3h 15m

Chicago Midway

Mon 6/9

6:20 pm-12:05 am

1 stop4h 45m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 6/5

6:25 am-9:51 am

1 stop4h 26m

Chicago O'Hare Intl

Mon 6/9

5:39 pm-11:46 pm

1 stop5h 07m

$177

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 5/12

6:14 pm-12:06 am

1 stop6h 52m

Lambert-St Louis

Thu 5/15

5:45 pm-5:24 pm

1 stop22h 39m

$180

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Mon 5/19

11:06 am-7:27 am

1 stop21h 21m

Chicago O'Hare Intl

Tue 5/20

9:08 pm-11:36 am

2 stops13h 28m

$195

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Fri 5/30

5:50 am-12:45 pm

1 stop7h 55m

Chicago O'Hare Intl

Mon 6/2

4:00 pm-10:05 pm

1 stop5h 05m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 53 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 April 24, 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 April 24, 2025.

The most flights from PIT to USIL are scheduled on a Friday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 24, 2025.
Read through reviews of airlines operating flights from Pittsburgh to Illinois, such as Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,918 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,685 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,918 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 $49. United Airlines flights start at $51 while deals on Frontier start at $80 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: Cathay Pacific (93%), Copa Airlines (92%), SWISS( 91%).

  • What are the cheapest flights from Pittsburgh to Illinois?

    Looking at all options, your cheapest flight can be booked for $78. While the most popular route (Pittsburgh - Chicago O'Hare Intl) can be booked for $77 on average our data indicates $834 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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Top 5 airlines flying from Pittsburgh to Illinois

Discover the top 5 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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$89Average$174FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$118Average$294FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$123Average$318FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$126Average$310FlexibilityNo cancel feeOn-time63%
DeltaCheapest$197Average$456FlexibilityNo cancel feeOn-timeN/A

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