What are the cheapest airlines flying from Chicago to Philadelphia round-trip?

According to our current data, Frontier ($157), Southwest ($159), and United Airlines ($159) offers the cheapest pricing from Chicago to Philadelphia. You may be able to fly from Chicago to Philadelphia for 32% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Chicago to Philadelphia one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $83. Users have also found prices from $88 and $89 on Spirit Airlines and Southwest, respectively.

How far ahead should I book a flight from Chicago to Philadelphia?

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Philadelphia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Chicago to Philadelphia?

Currently, August is the cheapest month in which you can book a flight from Chicago to Philadelphia (average of $236). Flying from Chicago to Philadelphia in March is currently the most expensive (average of $295). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Chicago to Philadelphia?

Travelers seeking maximum savings on their Chicago to Philadelphia flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to Philadelphia

The most flights from CHI to PHL are scheduled on a Tuesday (47 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

What are the cheapest flights from Chicago to Philadelphia?

The cheapest flight price from Chicago to Philadelphia is $90. On average you can expect to pay $1,086. The most popular route, (Chicago O'Hare Intl - Philadelphia), can usually be booked for $118.

What are the most reliable airlines from Chicago to Philadelphia?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago to Philadelphia on time: Air Canada (82%), United Airlines (76%), Air New Zealand (75%).

What are the most popular airlines that fly from Chicago to Philadelphia?

The most popular airlines flying from Chicago to Philadelphia are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Chicago to Philadelphia?

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 58% on the overall cost on flights from Chicago to Philadelphia.

How far in advance should I book a flight from Chicago to Philadelphia?

To save on the cost of your flight from Chicago to Philadelphia, book at least 49 days before your planned departure. Booking around this time can save you about 72% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $136 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $208.

What is the cheapest month to fly from Chicago to Philadelphia?

August can be a great time to fly to Philadelphia from Chicago with a flight ticket averaging about $234. Cheapflights users have found deals in the month of August for as cheap as $52. The most expensive prices can be found in the month of March.

What is the cheapest time of day to fly from CHI to PHL?

It’s typically best to fly out from Chicago to Philadelphia in the evening. Doing so could potentially save you 41% on the flight price compared to flying in the afternoon, which is usually more expensive.

What airport do you fly into for flights to Philadelphia from Chicago?

If you book a flight to Philadelphia from Chicago, you will be flying to Philadelphia, which is the city’s only airport. Philadelphia (PHL) is located 7.0 mi from the center of Philadelphia. There are 28 flights from Chicago to Philadelphia per day from 6 different airlines.

Can I find deals for flights from Chicago to Philadelphia that include hotel bookings?

Yes. In addition to deals on Chicago to Philadelphia flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Chicago to Philadelphia?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Philadelphia.

Can I find deals for business class flights from Chicago to Philadelphia?

Yes. Cheapflights offers flight deals from Chicago to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$83+ Flights from Chicago to Philadelphia

Round-trip from	$156 (Justfly.com)
One-way from	$83 (Priceline)
Popular in	March
Cheapest in	August
Average price	$177
Good round-trip deal	$155 or less
Good one-way deal	$94 or less

ORD

ORD's free shuttle train connects terminals, useful for navigating between nearly 200 gates. Plan for long walks if switching terminals.

MDW

Use the “L” train for easy access to MDW. The Orange Line stops directly at the airport, taking less than 30 minutes from downtown.

PHL

For quick access to downtown, use SEPTA's Airport Line. It's efficient and operates from 5:00 a.m. to midnight.

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$54	Average$129	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$63	Average$333	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$108	Average$336	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$138	Average$323	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$152	Average$282	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$172	Average$288	FlexibilityNo cancel fee	On-time63%

$83+ Cheap flights from Chicago (CHI) to Philadelphia (PHL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Chicago to Philadelphia with Cheapflights

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Cheapflights Tip: The best prices from Chicago to Philadelphia are usually found in August or September, booked 48 days in advance, depart on a Thursday or Friday and return on a Friday

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Cheapest flights from Chicago to PhiladelphiaExplore the most affordable flight options available from Chicago to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 2, 2025.

Explore the most affordable flight options available from Chicago to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 2, 2025.

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Use the filters below to find and compare flights from Chicago to Philadelphia that are best for you.

The best insider tips for Chicago to Philadelphia flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to Philadelphia trip

Airports

ORD

MDW

PHL

Our travel experts

Best time to book a flight from Chicago to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Chicago with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Philadelphia

How far ahead should I book a flight from Chicago to Philadelphia?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Philadelphia. Price data was last updated on June 27, 2025.

What is the cheapest month to book a flight from Chicago to Philadelphia?

What is the cheapest time of day to fly from CHI to PHL?

Find hourly flight availability from Chicago to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 2, 2025.

What is the cheapest day to fly from Chicago to Philadelphia?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Philadelphia. Price data was last updated on June 29, 2025.

Weekly flight availability from Chicago to Philadelphia

Explore weekly flight availability from Chicago to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated julio 2, 2025.

How much does it cost to fly round-trip from Chicago to Philadelphia?

Reviews of airlines servicing Philadelphia

See what other customers who have flown with Southwest, Delta, and United Airlines from Chicago to Philadelphia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Philadelphia from Chicago?

What are the cheapest airlines flying from Chicago to Philadelphia round-trip?

What are the cheapest airlines to fly from Chicago to Philadelphia one-way?

What are the most reliable airlines from Chicago to Philadelphia?

What are the cheapest flights from Chicago to Philadelphia?

Can I find deals for flights from Chicago to Philadelphia that include hotel bookings?

How can I find direct flights from Chicago to Philadelphia?

Can I find deals for business class flights from Chicago to Philadelphia?

What is the cheapest month to book a flight from Chicago to Philadelphia?

Traveling to a place near Chicago?

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Cheapest flights from Chicago to Philadelphia
Explore the most affordable flight options available from Chicago to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 2, 2025.