Cheap Flights from Chicago to Philadelphia from US$54

Frequently Asked Questions

• What are the cheapest flights from Chicago to Philadelphia (CHI-PHL)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$54 on Cheapest nonstop routes (e.g. ORD to PHL on Mon, Oct 26), while Frontier Airlines offers Cheapest nonstop round-trips from US$81 departing on Tue, Oct 27 and returning on Thu, Oct 29.

• Which airlines offer direct flights from Chicago to Philadelphia?

  At the moment, you can catch a nonstop flight from Chicago to Philadelphia with the following airlines, including: United Airlines American Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Chicago to Philadelphia?

  It takes about 2 hours 10 minutes to fly from Chicago to Philadelphia.

• When is the best time to book flights from Chicago to Philadelphia?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to Philadelphia is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Chicago to Philadelphia?

  Based on Trip.com data in the past 4 weeks, there is 108 flight per week flying from Chicago to Philadelphia. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA729 (09:38) American Airlines: S/M/-/W/T/F/S -- AA2970 (05:12)

• How can I find the best deals on flights from Chicago to Philadelphia?

  To find best deals on flights from Chicago to Philadelphia, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Oct 26, with one-way flights priced at just US$54.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Philadelphia travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Chicago (CHI) to Philadelphia (PHL) the cheapest?

  The cheapest months to fly from Chicago to Philadelphia is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Chicago to Philadelphia on?

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Chicago to Philadelphia on September 11, 2026 with Frontier Airlines, with prices starting at US$44.

• Which airports fly into Philadelphia from Chicago?

  You can land at any one of the following hubs in Philadelphia: Philadelphia International Airport (PHL), and Trenton Mercer Airport (TTN). Flying from O'Hare International Airport to Philadelphia International Airport (ORD-PHL) is by far the most common option on this route.

• Is there any time difference between Chicago and Philadelphia?

  The time difference between Philadelphia and Chicago is 1h.

• How do I change or cancel my ticket from Chicago to Philadelphia?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Chicago to Philadelphia?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Chicago to Philadelphia is US$204. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Chicago to Philadelphia?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Chicago to Philadelphia is US$309. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Chicago to Philadelphia on Trip.com?

  Enter Chicago and Philadelphia, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Chicago to Philadelphia route?

  Frontier Airlinesare the most popular budget airlines flying from Chicago to Philadelphia. Check baggage, seat and payment fees before comparing the final price.