$84 Find Cheap Flights from Pittsburgh to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Pittsburgh to Illinois departing on 4/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Pittsburgh to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Pittsburgh to Illinois, as well as popular online travel agencies
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Cheap Flights from Pittsburgh to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicagononstop$177
Moline
Moline1 stop$329
St. Louis
St. Louis1 stop$193
Chicago
Chicagononstop$177
Moline
Moline1 stop$329
St. Louis
St. Louis1 stop$193

Book Cheap Pittsburgh to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Pittsburgh to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Pittsburgh to Illinois

Sat, Apr 18 - Mon, Apr 20
Southwest Logo
8:25 am - 8:55 am
PIT
-
MDW
1h 30mnonstop
Southwest Logo
6:55 pm - 9:20 pm
MDW
-
PIT
1h 25mnonstop
$177Southwest
Thu, Apr 23 - Thu, Apr 23
United Airlines Logo
7:00 am - 7:49 am
PIT
-
ORD
1h 49mnonstop
United Airlines Logo
9:20 pm - 11:53 pm
ORD
-
PIT
1h 33mnonstop
$177United Airlines
Thu, Apr 23 - Sat, Apr 25
Spirit Airlines Logo
6:15 pm - 12:24 am
PIT
-
ORD
7h 09m
1 stop
Spirit Airlines Logo
5:05 am - 5:20 pm
ORD
-
PIT
11h 15m
1 stop
$183Spirit Airlines
Wed, May 13 - Tue, May 19
Frontier Logo
8:15 pm - 11:13 pm
PIT
-
ORD
27h 58m
1 stop
Frontier Logo
3:55 pm - 7:20 pm
ORD
-
PIT
26h 25m
1 stop
$184Frontier
Sat, Apr 18 - Mon, Apr 20
Southwest Logo
10:05 am - 1:10 pm
PIT
-
MDW
4h 05m
1 stop
Southwest Logo
7:40 am - 10:00 am
MDW
-
PIT
1h 20mnonstop
$187Southwest
Sat, Apr 11 - Tue, Apr 14
Spirit Airlines Logo
9:41 am - 11:17 pm
PIT
-
ORD
14h 36m
1 stop
Spirit Airlines Logo
4:36 pm - 9:38 am
ORD
-
PIT
16h 02m
1 stop
$195Spirit Airlines
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
6:00 pm - 9:52 pm
PIT
-
STL
4h 52m
1 stop
United Airlines Logo
9:10 am - 3:26 pm
STL
-
PIT
5h 16m
1 stop
$196United Airlines
Thu, Jun 4 - Mon, Jun 8
American Airlines Logo
8:38 pm - 9:40 pm
PIT
-
ORD
2h 02mnonstop
American Airlines Logo
12:35 pm - 3:09 pm
ORD
-
PIT
1h 34mnonstop
$201American Airlines
Mon, Apr 13 - Thu, Apr 16
Frontier Logo
7:00 pm - 11:19 pm
PIT
-
STL
29h 19m
1 stop
Frontier Logo
4:59 pm - 8:29 am
STL
-
PIT
14h 30m
1 stop
$217Frontier
Sat, May 16 - Sun, May 17
American Airlines Logo
7:11 pm - 11:54 pm
PIT
-
EVV
5h 43m
1 stop
American Airlines Logo
6:23 pm - 11:50 pm
EVV
-
PIT
4h 27m
1 stop
$329American Airlines
Booking Insights

KAYAK's insights & trends for Pittsburgh to Illinois flights

Get data-powered insights and trends into flights from Pittsburgh to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Pittsburgh to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Pittsburgh to Illinois departing in April.

What is the cheapest Pittsburgh to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Pittsburgh found in the last 72 hours was to Chicago, at $232 round-trip. The most popular route is from Pittsburgh (PIT) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $232.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Pittsburgh to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $384 on average. Morning departures are around 11% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $584.

Can I save money by flying with a layover from Pittsburgh to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $333, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Pittsburgh to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Pittsburgh to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Pittsburgh to Illinois is August, when tickets cost $196 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $387 and $347 respectively.

What’s the cheapest day of the week to fly from Pittsburgh to Illinois?

The average price of all round-trip flights from Pittsburgh to Illinois clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Pittsburgh to Illinois, look for departures on Fridays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Illinois, Thursday is the cheapest day to fly and Tuesday is the most expensive.

How far in advance should I book a flight from Pittsburgh to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Pittsburgh to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Pittsburgh to Illinois, you should book around 4 weeks before departure, which saves you about 61% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$84
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Pittsburgh to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Pittsburgh to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Pittsburgh to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Pittsburgh to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Pittsburgh to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Pittsburgh to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Pittsburgh to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Pittsburgh to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Pittsburgh to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Pittsburgh to the following destinations at these prices or less: Chicago $220 one-way - $326 round-trip

Reviews of the top 4 airlines serving from Pittsburgh to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Pittsburgh to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Pittsburgh to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4331 reviews
8.1Boarding
8.0Comfort
8.6Crew
7.0Food
7.5Entertainment
Airline reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

2.0 MediocreStuart, Mar 2026
HOU - STL
Read more Southwest reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Southwest continues to do less for more money. Flight attendants used to be fun and friendly. But now it’s like they don’t even see you. Such a shame.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

I liked it better when you were truer to your roots Am paying more for less fun

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

Boarding was easy. The seats are small and fairly uncomfortable

I was supposed to be on a later flight. When I showed up at the gate, the woman working there was extremely helpful getting moved up to this earlier flight.

We had a 5 hour delay on the tarmac in Baltimore

Long layover between flights to Long Island from BWI - need better coordination between flights

3 hour delay…. Nearly 2 hours sitting on tarmac. Do better, United. Or at least have the sense to not say “we hope you enjoyed your flight with us” upon disembarking.

Flights were on time. Free Wifi on plane. Everything was well organized.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

Delays with no explanation. It could have been handled better.

Jill was the flight attendant in first class she was fabulous!! Best flight attendant I have had in years.!! And I fly every other week. Other can learn from her!!

As a first class customer, there was no power the entire flight which limited my ability to work. I find this unacceptable. The first 11 rows on the left side of the plan were out. I was only offered the option to charge my phone which was not the issue because my laptop was out of power. I asked if there was anything that can be done for me, and the answer was, "no". I was not offered any type of compensation for this AA problem which caused me unnecessary stress due to inability to address business issues on an already challenging travel day. Flight attendants tried to reset the power once but that was the extent of their support. Very disappointing for the lack of expected services on a flight. Please contact me with customer focused response to this complaint.

There was no inflight service. Once we landed we were delayed to find a gate for an hour and a half which was 1/2 the total time in the air.

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

It was good experience this time. The flight was on time.

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

The gate agent had a really bad attitude and refused to help me get on the standby list. She just handed me a card and said I needed to call a number. I asked her to help with the AA app on my phone and she just shrugged and said she didnt know. After a few phone calls, I eventually just went to a different gate agent on the other side of the terminal and got the help I needed.

Overall, my last three trips on American Airlines have all been either delayed or "rescheduled" due to mechanical issues. At least on delay caused me to miss two possible connecting flights each later than the first. My last option for my last connection required the assistance of the onsite service desk (O'Hare Airport). The wait time for the service desk was such that it jeopardized getting booked on the last connecting flight available for the night. Suffice it to say, my latest experiences with American Airlines have caused me extensive loss of productive business and personal time and can therefore be classified as significantly less than satisfactory.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

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

Information on your arrival and departure airports