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Flights from Chicago to Philadelphia

Cheapest airlines flights from Chicago to Philadelphia

You can choose from 1 airlines that fly from Chicago to Philadelphia, including Frontier Airlines, Frontier Airlines has lowest fares on this route.
Frontier Airlines logo Frontier Airlines
Airlines are determined based on actual purchased flight tickets from Chicago to Philadelphia according to previous 12 months data from Trip.com.

Search for direct flights from Chicago to Philadelphia in the next 3 months. Based on Trip.com's latest 7-day flight data, one-way direct flights start at US$30, and round-trip direct flights start at US$60.

      • Cheapest nonstop
        ORD 16:44
        2h 15m
        Nonstop
        PHL 19:59
        Chicago - Philadelphia | Sat, Jan 31 | Frontier Airlines
        PHL 19:47
        2h 40m
        Nonstop
        ORD 21:27
        Philadelphia - Chicago | Tue, Feb 3 | Frontier Airlines
        US$60 US$129
        54% off
        54% off
        US$129 US$60
      • ORD 16:44
        2h 15m
        Nonstop
        PHL 19:59
        Chicago - Philadelphia | Sat, Jan 24 | Frontier Airlines
        PHL 19:47
        2h 40m
        Nonstop
        ORD 21:27
        Philadelphia - Chicago | Tue, Jan 27 | Frontier Airlines
        US$60 US$129
        54% off
        54% off
        US$129 US$60
      • ORD 15:22
        2h 15m
        Nonstop
        PHL 18:37
        Chicago - Philadelphia | Tue, Jan 27 | Frontier Airlines
        PHL 19:47
        2h 40m
        Nonstop
        ORD 21:27
        Philadelphia - Chicago | Tue, Feb 3 | Frontier Airlines
        US$61 US$129
        53% off
        53% off
        US$129 US$61
      • ORD 19:15
        2h 11m
        Nonstop
        PHL 22:26
        Chicago - Philadelphia | Sat, Feb 7 | Frontier Airlines
        PHL 16:37
        2h 33m
        Nonstop
        ORD 18:10
        Philadelphia - Chicago | Tue, Feb 10 | Frontier Airlines
        US$62
        52% off
        US$129 US$62
      • ORD 15:22
        2h 15m
        Nonstop
        PHL 18:37
        Chicago - Philadelphia | Tue, Feb 3 | Frontier Airlines
        PHL 21:09
        2h 40m
        Nonstop
        ORD 22:49
        Philadelphia - Chicago | Sat, Feb 7 | Frontier Airlines
        US$68
        47% off
        US$129 US$68
      • ORD 08:18
        2h 8m
        Nonstop
        PHL 11:26
        Chicago - Philadelphia | Sun, Feb 1 | American Airlines
        PHL 19:47
        2h 40m
        Nonstop
        ORD 21:27
        Philadelphia - Chicago | Tue, Feb 3 | Frontier Airlines
        US$86
        33% off
        US$129 US$86
      • ORD 08:20
        2h 9m
        Nonstop
        PHL 11:29
        Chicago - Philadelphia | Sat, Feb 21 | Frontier Airlines
        PHL 07:35
        2h 36m
        Nonstop
        ORD 09:11
        Philadelphia - Chicago | Tue, Feb 24 | Frontier Airlines
        US$87
        32% off
        US$129 US$87
      • ORD 09:52
        2h 6m
        Nonstop
        PHL 12:58
        Chicago - Philadelphia | Sat, Feb 28 | Frontier Airlines
        PHL 07:35
        2h 36m
        Nonstop
        ORD 09:11
        Philadelphia - Chicago | Tue, Mar 3 | Frontier Airlines
        US$88
        32% off
        US$129 US$88
      • ORD 19:20
        2h 15m
        Nonstop
        PHL 22:35
        Chicago - Philadelphia | Tue, Jan 20 | Frontier Airlines
        PHL 19:47
        2h 40m
        Nonstop
        ORD 21:27
        Philadelphia - Chicago | Tue, Jan 27 | Frontier Airlines
        US$92
        28% off
        US$129 US$92
      • ORD 20:43
        11h 4m
        1 stop
        PHL 08:47
        Chicago - Philadelphia | Sat, Jan 31 | Spirit Airlines
        PHL 19:47
        2h 40m
        Nonstop
        ORD 21:27
        Philadelphia - Chicago | Tue, Feb 3 | Frontier Airlines
        US$91
        30% off
        US$129 US$91
      • CHI 13:00
        17h 25m
        1 stop
        PHL Invalid Date
        Chicago - Philadelphia | Tue, Jan 20 | Normal Airline
        PHL 15:00
        6h
        Nonstop
        CHI 16:00
        Philadelphia - Chicago | Thu, Jan 22 | Normal Airline
        Find more flights
        Find more flights
      • Cheapest nonstop
        ORD 16:44
        2h 15m
        Nonstop
        PHL 19:59
        Chicago - Philadelphia | Fri, Jan 23 | Frontier Airlines
        US$30 US$91
        67% off
        67% off
        US$91 US$30
      • ORD 16:44
        2h 15m
        Nonstop
        PHL 19:59
        Chicago - Philadelphia | Fri, Feb 6 | Frontier Airlines
        US$31 US$91
        67% off
        67% off
        US$91 US$31
      • ORD 15:15
        2h 11m
        Nonstop
        PHL 18:26
        Chicago - Philadelphia | Mon, Mar 2 | Frontier Airlines
        US$59 US$91
        36% off
        36% off
        US$91 US$59
      • ORD 16:44
        2h 15m
        Nonstop
        PHL 19:59
        Chicago - Philadelphia | Fri, Jan 30 | Frontier Airlines
        US$65
        28% off
        US$91 US$65
      • ORD 20:43
        11h 4m
        1 stop
        PHL 08:47
        Chicago - Philadelphia | Fri, Jan 23 | Spirit Airlines
        US$46
        50% off
        US$91 US$46
      • ORD 20:43
        11h 4m
        1 stop
        PHL 08:47
        Chicago - Philadelphia | Fri, Feb 6 | Spirit Airlines
        US$61
        33% off
        US$91 US$61
      • ORD 08:10
        6h 27m
        1 stop
        PHL 15:37
        Chicago - Philadelphia | Wed, Jan 28 | Frontier Airlines
        US$62
        33% off
        US$91 US$62
      • ORD 14:53
        8h 49m
        1 stop
        PHL 00:42
        Chicago - Philadelphia | Tue, Jan 27 | Frontier Airlines
        US$62
        33% off
        US$91 US$62
      • ORD 05:15
        13h 37m
        1 stop
        PHL 19:52
        Chicago - Philadelphia | Wed, Feb 25 | Spirit Airlines
        US$64
        31% off
        US$91 US$64
      • ORD 05:15
        13h 46m
        1 stop
        PHL 20:01
        Chicago - Philadelphia | Thu, Jan 22 | Spirit Airlines
        US$64
        30% off
        US$91 US$64
      • CHI 13:00
        17h 25m
        1 stop
        PHL Invalid Date
        Chicago - Philadelphia | Tue, Jan 20 | Normal Airline
        Find more flights
        Find more flights

Displayed flight fares from Chicago to Philadelphia are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Chicago to Philadelphia Flight Details

The distance between Chicago and Philadelphia is about 1,065.25 km. The average flying time from Chicago to Philadelphia is around 2 hours. Based on Trip.com's latest data, travel demand is highest in July. The off-season for travel is October.

Cheapest one-way flight priceUS$30
Cheapest return ticket priceUS$60
Cheapest monthOctober
Peak season for travelJuly
Flight distance1,065.25 km
Average flight time2 hours
Popular airlineFrontier Airlines
Flight statistics for the Chicago–Philadelphia route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Chicago to Philadelphia

Which month has the cheapest one-way flights from Chicago to Philadelphia?

The average price of one-way flights from Chicago to Philadelphia purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Chicago to Philadelphia is Oct, with an average price of US$122; while the month with the highest flight price is usually Feb, with an average price of up to US$372.

US$372
US$247
US$122
0
    Cheapest
  • US$250
    Jan
  • US$372
    Feb
  • US$133
    Mar
  • US$148
    Apr
  • US$163
    May
  • US$140
    Jun
  • US$151
    Jul
  • US$198
    Aug
  • US$173
    Sep
  • US$122
    Oct
  • US$144
    Nov
  • US$174
    Dec

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

Average weekly flight prices from Chicago to Philadelphia by travel date (Based on Trip.com’s past 12 months of data)

Based on Trip.com’s past 12 months of flight data, the cheapest day to fly from Chicago to Philadelphia is Fri, with average prices lower than on other days. Avoid Tue, as prices are usually highest then.

US$288
US$215
US$142
US$69
    Cheapest
  • US$155
    Mon
  • US$287
    Tue
  • US$195
    Wed
  • US$153
    Thu
  • US$142
    Fri
  • US$166
    Sat
  • US$157
    Sun

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$30 on Cheapest nonstop routes (e.g. ORD to PHL on Fri, Jan 23), while Frontier Airlines offers Cheapest nonstop round-trips from US$60 departing on Sat, Jan 31 and returning on Tue, Feb 3.
  • At the moment, you can catch a nonstop flight from Chicago to Philadelphia with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 2 hours to fly 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.
  • Based on Trip.com data in the past 4 weeks, there is 66 flight per week flying from Chicago to Philadelphia. You can check the weekly schedule for popular airlines on this route below: American Airlines: S/M/T/W/T/F/S -- AA1212 (10:21) American Airlines: S/M/T/W/T/F/S -- AA2548 (21:11)
  • 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 Fri, Jan 23, with one-way flights priced at just US$30.
    · 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.
  • The cheapest months to fly from Chicago to Philadelphia is October, when demand for travel is lower.
  • After crunching the numbers on our January flight calendar, it's currently cheapest to fly from Chicago to Philadelphia on January 30, 2026 with Frontier Airlines, with prices starting at US$30.
  • You can land at any one of the following hubs in Philadelphia, with O'Hare International Airport to Philadelphia International Airport (ORD-PHL) is by far the most common option on this route: Philadelphia International Airport (PHL) Trenton Mercer Airport (TTN).
  • The time difference between Philadelphia and Chicago is 1h.
  • 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.

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