Cheap flights from Philadelphia to Illinois from $28
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 4/8. 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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0 bags
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Cheap round-trip flights
These are some of the best round-trip flight deals from Philadelphia to Illinois that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Philadelphia to Illinois.
Cheap last minute flights
Planning a quick getaway from Philadelphia to Illinois? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Illinois, so you can enjoy a seamless trip without layovers.
Cheap bus & train deals from Philadelphia to Illinois
Find recent round-trip train or bus tickets from Philadelphia to Illinois.
All round-trip flight deals from Philadelphia to Illinois
The cheapest plane tickets from Philadelphia to Illinois found on KAYAK recently.
United Airlines flights from Philadelphia to Illinois
Our best United Airlines deals on Philadelphia to Illinois flight tickets
United Airlines![United Airlines]()
Apr 16![United Airlines]()
Apr 23
PHL12:50 pmPhiladelphia
2h 24m
ORD2:14 pmChicago O'Hare Intl
ORD7:30 amChicago O'Hare Intl
2h 08m
PHL10:38 amPhiladelphia
United Airlines![United Airlines]()
Feb 13![United Airlines]()
Feb 13
PHL6:30 amPhiladelphia
2h 31m
ORD8:01 amChicago O'Hare Intl
ORD2:25 pmChicago O'Hare Intl
2h 00m
PHL5:25 pmPhiladelphia
Frontier flights from Philadelphia to Illinois
Our best Frontier deals on Philadelphia to Illinois flight tickets
Frontier![Frontier]()
Apr 1![Frontier]()
Apr 8
PHL6:40 amPhiladelphia
18h 41m
1 stop
MDW12:21 amChicago Midway
MDW2:36 pmChicago Midway
2h 00m
PHL5:36 pmPhiladelphia
Frontier![Frontier]()
Apr 24![Frontier]()
Apr 28
PHL5:30 amPhiladelphia
6h 56m
1 stop
ORD11:26 amChicago O'Hare Intl
ORD10:55 amChicago O'Hare Intl
12h 35m
1 stop
PHL12:30 amPhiladelphia
See travel insights to Illinois from
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
Prices
Airlines
Other information
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 $118, 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 July is also cheap. Prices for this month can be found on momondo for an average of $161.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Philadelphia to Illinois is on a Thursday when prices can be found for as low as $273. Flights from Philadelphia to Illinois on a Sunday will generally be more expensive and average around $395. 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 $168. Flights at noon are often more expensive with an average ticket price of $351.
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 $246 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 $183 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?
Frontier, Spirit Airlines, and United Airlines 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 41% 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 34 per day as of January 2025. The most frequent departure time is 10:00AM, with 43% of daily flights leaving at noon.
How many flights depart from Philadelphia to Illinois on average per week?
243 flights are operational weekly from Philadelphia to Illinois as of January 2025. The most popular departure day for this route is Mon, with 18% 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 January 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 23.04% of all bookings. The subsequent popular models are Airbus A320-100/200 at 11.08%, Airbus A320neo at 10.21%, and Airbus A321-100/200 at 9.97%.
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 $48 | Free Cancellation | Rating 6.0 3,440 reviews | |||
| PriceFrom $131 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $139 | Free Cancellation | Rating 7.4 8,971 reviews | |||
| PriceFrom $150 | Free Cancellation | Rating 8.1 4,647 reviews | |||
| PriceFrom $186 | Free Cancellation | Rating 8.0 8,508 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.
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