Cheap flights from Pennsylvania to Illinois from $42
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Pennsylvania to Illinois departing on 7/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from Pennsylvania to Illinois
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How to get the cheapest flight ticket from Pennsylvania to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Pennsylvania is in September. Flight prices, which tend to average around $120, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $175.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Pennsylvania to Illinois is on a Friday when prices can be found for as low as $302. Flights from Pennsylvania to Illinois on a Sunday will generally be more expensive and average around $435. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Pennsylvania to Illinois during this time can be as low as $223. Flights at noon are often more expensive with an average ticket price of $363.
What is the cheapest Pennsylvania to Illinois flight route?
Fly from Philadelphia to Chicago Midway for the best Pennsylvania - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Pennsylvania when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $267 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Pennsylvania for as low as $210 on momondo.
What cabin class options are available on Pennsylvania to Illinois flights?
There are 4 cabin classes available to choose from on Pennsylvania to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Pennsylvania to Illinois?
Spirit Airlines, JetBlue, and Delta are the most popular carriers operating from Pennsylvania to Illinois
What airlines fly to Illinois?
American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from Pennsylvania according to our data. American Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Pennsylvania to Illinois on average per day?
The number of flights available between Pennsylvania and Illinois is 288 per day as of June 2025. The most frequent departure time is 4:00PM, with 47% of daily flights leaving at noon.
How many flights depart from Pennsylvania to Illinois on average per week?
As of June 2025, there are 2,018 flights per week flying from Pennsylvania to Illinois. The most common day of the week flights depart is Sun, with 16% of flights taking off on this day.
Cheap Pennsylvania to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Pennsylvania to Illinois
When did momondo last update prices for flights from Pennsylvania to Illinois?
Prices for flights from Pennsylvania to Illinois refresh daily.
How many operators does momondo search for flights from Pennsylvania to Illinois?
As of June 2025, there are 7 operators available to choose from for flights from Pennsylvania to Illinois.
How old do you have to be to fly from Pennsylvania to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Pennsylvania to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Pennsylvania to Illinois?
Based on momondo bookings for flights between Pennsylvania and Illinois, the leading plane model is Boeing 737-800, making up 21.14% of the total bookings. Other popular models include Boeing 737 MAX 8 with 10.41%, Airbus A319 with 9.85%, and Airbus A320-100/200 with 8.93%.
Best airlines flying from Pennsylvania to Illinois
Compare and see reviews for airlines that fly from Pennsylvania to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $50 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $118 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $126 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $126 | Free Cancellation | Rating 8.0 4,278 reviews | |||
| PriceFrom $142 | Free Cancellation | Rating 7.4 8,801 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Pennsylvania to Illinois?
It is quick and easy to find Pennsylvania to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.
Can I find flights from Pennsylvania to Illinois with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Illinois from Pennsylvania with this policy.
How can momondo help me find flights from Pennsylvania to Illinois?
Once all potential Pennsylvania to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Pennsylvania to Illinois right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Pennsylvania to Illinois flights. All you need is a valid email address and we will do the rest; it is that quick and easy.