Cheap flights from Chicago O'Hare Intl Airport to Philadelphia from $119

The cheapest month to fly to Philadelphia from Chicago O'Hare Intl Airport is in October. Flight prices, which tend to average around $198, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Philadelphia, with average flight prices from Chicago O'Hare Intl Airport averaging around $262.

The cheapest day to depart from Chicago O'Hare Intl Airport to Philadelphia is on a Friday. Travelers who choose to depart for Philadelphia on a Friday will often find tickets for as low as $279. On the other hand, Monday is the most expensive day to depart from Chicago O'Hare Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $437.

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Chicago O'Hare Intl Airport to Philadelphia in the evening for as low as $267. 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 $415.

Fly from Chicago O'Hare Intl to Philadelphia for the best Chicago O'Hare Intl - Philadelphia flight prices

You are more likely to see cheaper flights to Philadelphia from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $314 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Chicago O'Hare Intl Airport for as low as $226 on momondo.

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines and Delta are the most popular carriers operating from Chicago O'Hare Intl to Philadelphia

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Philadelphia from Chicago O'Hare Intl Airport according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 5 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between Chicago and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 143 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 21% of their flights experiencing any sort of delay.

As of August 2026, there are 41 flights per day flying from Chicago O'Hare Intl Airport to Philadelphia. The most common time of day flights depart is 11:00AM, with 44% of flights taking off in the afternoon.

293 flights are operational weekly from Chicago O'Hare Intl Airport to Philadelphia as of August 2026. The most popular departure day for this route is Fri, with 17% of flights per week taking off on this day.