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$54+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ORD
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from Pittsburgh to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Pittsburgh (PIT) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$170
(Frontier)

One-way from

$54
(Frontier)

Popular in

January

Cheapest in

August

Average price

$325

Good round-trip deal

$350 or less

Good one-way deal

$207 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
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Highest demand for flights based on searches. 5% potential increase in price ($17 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 January 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 January 30, 2025.

This Frontier deal was found by Cheapflights users on 1/28. 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.
Fri 2/288:36 pmPIT - ORD
1 stop13h 39mFrontier
Sun 3/28:14 amORD - PIT
1 stop10h 38mFrontier
Deal found 1/28$170
This Southwest deal was found by Cheapflights users on 1/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/225:15 pmPIT - MDW
1 stop5h 25mSouthwest
Mon 2/246:00 amMDW - PIT
1 stop3h 55mSouthwest
Deal found 1/29$172
This Southwest deal was found by Cheapflights users on 1/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/145:50 pmPIT - ORD
1 stop4h 40mSouthwest
Mon 3/177:00 amORD - PIT
1 stop4h 25mSouthwest
Deal found 1/29$172
This Mytrip deal was found by Cheapflights users on 1/30. 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 2/182:45 pmPIT - ORD
2 stops20h 55mSpirit Airlines
Thu 2/205:15 amORD - PIT
1 stop7h 25mSpirit Airlines
Deal found 1/30$173
This CheapOair deal was found by Cheapflights users on 1/30. 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 2/119:17 pmPIT - ORD
1 stop14h 48mMultiple Airlines
Sat 2/158:44 pmORD - PIT
1 stop22h 08mMultiple Airlines
Deal found 1/30$174
This United Airlines deal was found by Cheapflights users on 1/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/47:00 amPIT - ORD
Nonstop1h 43mUnited Airlines
Mon 4/76:00 pmORD - PIT
Nonstop1h 39mUnited Airlines
Deal found 1/29$176
This Delta deal was found by Cheapflights users on 1/30. 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.
Tue 3/410:28 amPIT - MDW
1 stop3h 37mDelta
Tue 3/116:00 amMDW - PIT
1 stop4h 44mDelta
Deal found 1/30$177
This Delta deal was found by Cheapflights users on 1/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/157:50 amPIT - ORD
1 stop5h 19mDelta
Thu 4/179:26 amORD - PIT
1 stop2h 55mDelta
Deal found 1/28$177
This CheapOair deal was found by Cheapflights users on 1/29. 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 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
Sun 4/612:46 pmMDW - PIT
1 stop18h 57mFrontier
Deal found 1/29$183
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Wed 2/1912:17 pmPIT - ORD
Nonstop1h 40mAmerican Airlines
Wed 2/195:36 pmORD - PIT
1 stop5h 20mAmerican Airlines
Deal found 1/29$207
This FlightHub deal was found by Cheapflights users on 1/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/297:00 amPIT - STL
1 stop12h 22mSpirit Airlines
Tue 5/207:37 pmSTL - PIT
1 stop27h 27mSpirit Airlines
Deal found 1/29$225
This Southwest deal was found by Cheapflights users on 1/30. 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.
Thu 2/201:35 pmPIT - STL
Nonstop1h 55mSouthwest
Mon 2/248:20 amSTL - PIT
Nonstop1h 35mSouthwest
Deal found 1/30$253

Find flights from Pittsburgh to Illinois within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Fri 2/28

8:36 pm-9:15 am

1 stop13h 39m

Chicago O'Hare Intl

Sun 3/2

8:14 am-7:52 pm

1 stop10h 38m

$170

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Sat 2/22

5:15 pm-9:40 pm

1 stop5h 25m

Chicago Midway

Mon 2/24

6:00 am-10:55 am

1 stop3h 55m

$172

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Fri 3/14

5:50 pm-9:30 pm

1 stop4h 40m

Chicago O'Hare Intl

Mon 3/17

7:00 am-12:25 pm

1 stop4h 25m

$172

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 2/18

2:45 pm-10:40 am

2 stops20h 55m

Chicago O'Hare Intl

Thu 2/20

5:15 am-1:40 pm

1 stop7h 25m

$173

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 2/11

9:17 pm-11:05 am

1 stop14h 48m

Chicago O'Hare Intl

Sat 2/15

8:44 pm-7:52 pm

1 stop22h 08m

$174

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Fri 4/4

7:00 am-7:43 am

Nonstop1h 43m

Chicago O'Hare Intl

Mon 4/7

6:00 pm-8:39 pm

Nonstop1h 39m

$176

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Tue 3/4

10:28 am-1:05 pm

1 stop3h 37m

Chicago Midway

Thu 3/6

12:44 pm-6:37 pm

1 stop4h 53m

$177

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 4/15

7:50 am-12:09 pm

1 stop5h 19m

Chicago O'Hare Intl

Thu 4/17

9:26 am-1:21 pm

1 stop2h 55m

$177

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Tue 4/1

2:23 pm-7:51 pm

1 stop6h 28m

Chicago Midway

Sun 4/6

12:46 pm-8:43 am

1 stop18h 57m

$183

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Wed 2/19

12:17 pm-12:57 pm

Nonstop1h 40m

Chicago O'Hare Intl

Wed 2/19

5:36 pm-11:56 pm

1 stop5h 20m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 48 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.

Travel insights for flights from Pittsburgh to Illinois

Get recent, data-driven insights about flights from Pittsburgh to Illinois including ideal travel times, pricing trends, and more.

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 $325). 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 January 30, 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 January 30, 2025.

The most flights from PIT to USIL are scheduled on a Wednesday (40 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 January 30, 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
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,153 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 Frontier, which is currently one of the cheapest options available, starting at $54. Spirit Airlines flights start at $56 while deals on Southwest start at $69 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: Air Wisconsin (100%), SWISS (96%), Qantas Airways( 89%).

  • What are the cheapest flights from Pittsburgh to Illinois?

    Looking at all options, your cheapest flight can be booked for $143. While the most popular route (Pittsburgh - Chicago O'Hare Intl) can be booked for $119 on average our data indicates $1,237 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 $325). 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.

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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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$127Average$379FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$135Average$334FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$153Average$306FlexibilityNo cancel feeOn-time63%
DeltaCheapest$155Average$363FlexibilityNo cancel feeOn-timeN/A
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