Cheap flights from Philadelphia to Illinois from $60
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Illinois departing on 7/10. 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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How to get the cheapest flight ticket from Philadelphia 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 Philadelphia is in September. Flight prices, which tend to average around $119, 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 $174.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Philadelphia to Illinois is on a Friday when prices can be found for as low as $301. Flights from Philadelphia to Illinois on a Sunday will generally be more expensive and average around $436. 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 Philadelphia to Illinois during this time can be as low as $221. Flights in the morning are often more expensive with an average ticket price of $361.
What is the cheapest Philadelphia to Illinois flight route?
Fly from Philadelphia to Chicago O'Hare Intl for the best Philadelphia - 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 Philadelphia when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $266 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Philadelphia for as low as $210 on momondo.
What cabin class options are available on Philadelphia to Illinois flights?
There are 4 cabin classes available to choose from on Philadelphia 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 Philadelphia to Illinois?
Spirit Airlines, United Airlines, and Southwest are the most popular carriers operating from Philadelphia 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 Philadelphia according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 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 Philadelphia to Illinois on average per day?
The number of flights available between Philadelphia and Illinois is 43 per day as of June 2025. The most frequent departure time is 4:00PM, with 45% of daily flights leaving in the afternoon.
How many flights depart from Philadelphia to Illinois on average per week?
307 flights are operational weekly from Philadelphia to Illinois as of June 2025. The most popular departure day for this route is Thu, with 19% of flights per week taking off on this day.
Cheap Philadelphia to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Illinois
When did momondo last update prices for flights from Philadelphia Airport to Illinois?
Prices for flights from Philadelphia Airport to Illinois are updated daily.
How many operators does momondo search for flights from Philadelphia Airport to Illinois?
The number of operators available for flights from Philadelphia Airport to Illinois is 5 as of June 2025.
How old do you have to be to fly from Philadelphia Airport to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Philadelphia Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Philadelphia to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Philadelphia to Illinois is Boeing 737-800, representing 26.32% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 11.18%, Airbus A320-100/200 at 9.21%, and Airbus A319 at 8.41%.
Best airlines flying from Philadelphia to Illinois
Compare and see reviews for airlines that fly from Philadelphia to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $50 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $118 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $144 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $155 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $170 | Free Cancellation | Rating 8.0 4,287 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Philadelphia to Illinois?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Illinois. momondo saves you time and could save you money on your trip.
Can I find flights from Philadelphia to Illinois with flexible booking policies on momondo?
All flight searches from Philadelphia to Illinois on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Philadelphia to Illinois?
Once all potential Philadelphia 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 Philadelphia to Illinois right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Philadelphia and alert you when they change.