Cheap flights from Philadelphia to Chicago from $91

The month of January is, on average, the cheapest month to fly to Chicago from Philadelphia, with most prices found around $233. If you’re not able to fly to Chicago in January, then November is your next best option. Flight prices from Philadelphia to Chicago during November average around $265.

The cheapest day to depart on your flight to Chicago is on a Friday when prices can be found for as low as $370. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to Chicago for around $509.

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Philadelphia to Chicago during this time can be as low as $354. In contrast, the most expensive time of day to depart to Chicago is at noon when prices are around $429.

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

You are more likely to see cheaper flights to Chicago from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $320 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Philadelphia for as low as $275 on momondo.

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

No. A direct flight is the cheapest option for a flight between Philadelphia to Chicago.

As of October 2026, prices for Philadelphia to Chicago flights are approximately 11% more expensive when compared to flights at the same time last year.

Southwest, Frontier, and United Airlines are the most popular carriers operating from Philadelphia to Chicago

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Chicago from Philadelphia according to our data. United Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 6 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between Philadelphia and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

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

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday 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 9% of their flights experiencing any sort of delay.

As of October 2026, 30 flights take off from Philadelphia and land in Chicago each day. The most common flight departure time for this route is 11:00AM, with 48% of daily flights taking off at noon.

As of October 2026, 213 flights take off from Philadelphia and land in Chicago each week. The most common flight departure day for this route is Sun, with 24% of weekly flights taking off on this day.