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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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ORD
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$133
(Southwest)

One-way from

$49
(Southwest)

Popular in

March

Cheapest in

August

Average price

$346

Good round-trip deal

$325 or less

Good one-way deal

$179 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. 4% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 26, 2025.

This Southwest deal was found by Cheapflights users on 3/25. 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 4/1510:20 amPIT - MDW
2 stops9h 50mSouthwest
Wed 4/1610:35 amMDW - PIT
2 stops7h 10mSouthwest
Deal found 3/25$133
This Mytrip deal was found by Cheapflights users on 3/25. 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 4/229:07 pmPIT - ORD
2 stops28h 13mSpirit Airlines
Tue 4/297:47 pmORD - PIT
2 stops23h 25mSpirit Airlines
Deal found 3/25$136
This United Airlines deal was found by Cheapflights users on 3/25. 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.
Tue 4/227:00 amPIT - ORD
Nonstop1h 43mUnited Airlines
Thu 4/248:45 amORD - PIT
1 stop4h 15mUnited Airlines
Deal found 3/25$152
This Southwest deal was found by Cheapflights users on 3/26. 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 4/227:25 amPIT - ORD
1 stop8h 35mSouthwest
Thu 4/244:00 pmORD - PIT
1 stop5h 05mSouthwest
Deal found 3/26$162
This American Airlines deal was found by Cheapflights users on 3/26. 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.
Mon 5/125:25 amPIT - ORD
Nonstop1h 43mAmerican Airlines
Mon 5/197:05 pmORD - PIT
Nonstop1h 37mAmerican Airlines
Deal found 3/26$172
This Delta deal was found by Cheapflights users on 3/25. 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 4/236:25 pmPIT - MDW
1 stop4h 57mDelta
Thu 4/245:59 pmMDW - PIT
1 stop4h 04mDelta
Deal found 3/25$177
This Delta deal was found by Cheapflights users on 3/24. 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 4/166:15 amPIT - ORD
1 stop5h 17mDelta
Sat 4/194:15 pmORD - PIT
1 stop6h 26mDelta
Deal found 3/24$177
This CheapOair deal was found by Cheapflights users on 3/25. 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.
Tue 4/12:23 pmPIT - MDW
1 stop6h 28mFrontier
Thu 4/312:46 pmMDW - PIT
1 stop18h 57mFrontier
Deal found 3/25$200
This CheapOair deal was found by Cheapflights users on 3/26. 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.
Sun 4/69:21 pmPIT - ORD
1 stop12h 23mFrontier
Sun 4/1311:25 amORD - PIT
1 stop20h 18mFrontier
Deal found 3/26$208
This Booking.com deal was found by Cheapflights users on 3/25. 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.
Wed 4/211:48 amPIT - STL
1 stop12h 58mFrontier
Sat 4/54:57 pmSTL - PIT
1 stop26h 31mFrontier
Deal found 3/25$208
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Tue 5/64:15 pmPIT - STL
1 stop8h 36mAmerican Airlines
Sat 5/106:00 amSTL - PIT
1 stop8h 45mAmerican Airlines
Deal found 3/25$213
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Fri 6/63:52 pmPIT - RFD
1 stop17h 12mAllegiant Air
Mon 6/93:03 pmRFD - PIT
1 stop21h 28mAllegiant Air
Deal found 3/25$245

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 March 26, 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

Tue 4/15

10:20 am-7:10 pm

2 stops9h 50m

Chicago Midway

Wed 4/16

10:35 am-6:45 pm

2 stops7h 10m

$133

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 4/22

9:07 pm-12:20 am

2 stops28h 13m

Chicago O'Hare Intl

Tue 4/29

7:47 pm-8:12 pm

2 stops23h 25m

$136

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 4/22

7:00 am-7:43 am

Nonstop1h 43m

Chicago O'Hare Intl

Thu 4/24

8:45 am-2:00 pm

1 stop4h 15m

$152

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 4/22

6:00 am-11:50 am

1 stop6h 50m

Chicago O'Hare Intl

Thu 4/24

4:00 pm-10:05 pm

1 stop5h 05m

$162

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Mon 5/12

5:25 am-6:08 am

Nonstop1h 43m

Chicago O'Hare Intl

Mon 5/19

7:05 pm-9:42 pm

Nonstop1h 37m

$172

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Wed 4/23

6:25 pm-10:22 pm

1 stop4h 57m

Chicago Midway

Thu 4/24

5:59 pm-11:03 pm

1 stop4h 04m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Wed 4/16

6:15 am-10:32 am

1 stop5h 17m

Chicago O'Hare Intl

Sat 4/19

4:15 pm-11:41 pm

1 stop6h 26m

$177

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Tue 4/1

2:23 pm-7:51 pm

1 stop6h 28m

Chicago Midway

Thu 4/3

12:46 pm-8:43 am

1 stop18h 57m

$200

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Sun 4/6

9:21 pm-8:44 am

1 stop12h 23m

Chicago O'Hare Intl

Sun 4/13

11:25 am-8:43 am

1 stop20h 18m

$208

PittsburghSt. Louis

PIT - STL

PITSTL

Pittsburgh

Mon 4/7

9:46 am-11:46 pm

1 stop15h 00m

Lambert-St Louis

Thu 4/10

4:57 pm-8:43 am

1 stop14h 46m

$208

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 54 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 $323). 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 March 26, 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 March 26, 2025.

The most flights from PIT to USIL are scheduled on a Wednesday (43 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 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 March 26, 2025.
Read through reviews of airlines operating flights from Pittsburgh to Illinois, such as Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Comfort

8.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Comfort

8.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,795 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Comfort

8.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,895 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Comfort

8.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Comfort

8.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,923 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Comfort

8.1

Overall

8.1

Crew

8.6

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 $49 while deals on Spirit Airlines start at $57 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: Republic Airways (95%), Alaska Airlines (94%), Avianca( 93%).

  • 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 $97 on average our data indicates $1,463 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 $323). 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 4 airlines flying from Pittsburgh to Illinois

Discover the top 4 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$122Average$361FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$131Average$324FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$132Average$302FlexibilityNo cancel feeOn-time63%
DeltaCheapest$197Average$463FlexibilityNo cancel feeOn-timeN/A
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