Cheap flights from Illinois to Philadelphia from $48
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Philadelphia departing on 9/18. 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 Illinois to Philadelphia
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 Philadelphia?
The cheapest month to fly to Philadelphia from Illinois is in August. Flight prices, which tend to average around $133, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Philadelphia, with average flight prices from Illinois averaging around $134.
What is the cheapest day to depart on your flight to Philadelphia?
The cheapest day to depart from Illinois to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $241. On the other hand, Sunday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $383.
What is the cheapest time of day to depart on your flight to Philadelphia?
According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Illinois to Philadelphia in the evening for as low as $226. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the afternoon when prices are around $383.
What is the cheapest Illinois to Philadelphia flight route?
Fly from Chicago Midway to Philadelphia for the best Illinois - Philadelphia flight prices
How far in advance should I book a flight to Philadelphia?
You are more likely to see cheaper flights to Philadelphia from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $255 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Illinois for as low as $169 on momondo.
What cabin class options are available on Illinois to Philadelphia flights?
There are 4 cabin classes available to choose from on Illinois to Philadelphia 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 Illinois to Philadelphia?
Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Illinois to Philadelphia
What airlines fly to Philadelphia?
American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Philadelphia from Illinois 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 Philadelphia. Keep in mind that there are 6 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to Philadelphia on average per day?
As of July 2025, there are 26 flights per day flying from Illinois to Philadelphia. The most common time of day flights depart is 2:00PM, with 38% of flights taking off in the evening.
How many flights depart from Illinois to Philadelphia on average per week?
As of July 2025, 185 flights take off from Illinois and land in Philadelphia each week. The most common flight departure day for this route is Thu, with 34% of weekly flights taking off on this day.
Cheap Illinois to Philadelphia flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Philadelphia
Best Price Found | $48 |
|---|---|
Fastest flight time | 1h 50m |
Direct flights | Mon, Tue, Thu, Fri, Sat and Sun |
Airports in Philadelphia | 1 airport |
When did momondo last update prices for flights from Illinois to Philadelphia Airport?
Prices for flights from Illinois to Philadelphia Airport refresh daily.
How many operators does momondo search for flights from Illinois to Philadelphia Airport?
As of July 2025, there are 6 operators available to choose from for flights from Illinois to Philadelphia Airport.
How old do you have to be to fly from Illinois to Philadelphia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to Philadelphia?
Based on momondo bookings for flights between Illinois and Philadelphia, the leading plane model is Boeing 737-800, making up 26.31% of the total bookings. Other popular models include Airbus A320-100/200 with 13.89%, Boeing 737 MAX 8 with 8.65%, and Airbus A319 with 8.26%.
Best airlines flying from Illinois to Philadelphia
Compare and see reviews for airlines that fly from Illinois to Philadelphia with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $54 | Free Cancellation | Rating 5.9 3,286 reviews | |||
| PriceFrom $63 | Free Cancellation | Rating 6.3 8,086 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 8.0 7,982 reviews | |||
| PriceFrom $138 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $152 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $172 | Free Cancellation | Rating 8.0 4,266 reviews |
Traveling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Illinois to Philadelphia?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Philadelphia. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Illinois to Philadelphia with flexible booking policies on momondo?
momondo does allow users to show only those flights to Philadelphia from Illinois which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Illinois to Philadelphia?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Philadelphia.
I’m not ready to book a flight from Illinois to Philadelphia right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Philadelphia, momondo offers a useful price alert feature which will track prices for flights to Philadelphia from Illinois and alert you when they change.