Frontier offers extra comfort seats with 32” separation for a fee, enhancing short-haul comfort.
Frontier's Zone 1 boarding is available with a carry-on purchase or special fare bundle.

Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $106 (CheapOair) |
One-way from | $63 (Super.com) |
Popular in | March |
Cheapest in | October |
Average price | $256 |
Good round-trip deal | $170 or less |
Good one-way deal | $110 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Tue 12/16
11:05 am-2:07 pm
Nonstop2h 02m
Philadelphia
Wed 12/31
5:00 pm-6:31 pm
Nonstop2h 31m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 12/3
6:02 pm-9:10 pm
Nonstop2h 08m
Philadelphia
Wed 12/10
1:15 pm-2:35 pm
Nonstop2h 20m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Thu 2/5
8:56 am-12:07 pm
Nonstop2h 11m
Philadelphia
Sun 2/8
5:00 pm-6:30 pm
Nonstop2h 30m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Thu 12/4
11:05 am-2:07 pm
Nonstop2h 02m
Philadelphia
Thu 12/11
6:30 am-7:56 am
Nonstop2h 26m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Thu 12/11
11:05 am-2:07 pm
Nonstop2h 02m
Philadelphia
Sun 12/14
1:15 pm-2:35 pm
Nonstop2h 20m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Tue 12/2
9:00 am-12:07 pm
Nonstop2h 07m
Philadelphia
Wed 12/3
8:05 pm-11:43 pm
1 stop4h 38m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Fri 12/12
9:00 am-12:07 pm
Nonstop2h 07m
Philadelphia
Sat 12/13
6:30 am-7:56 am
Nonstop2h 26m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Tue 12/30
6:44 pm-10:18 am
1 stop14h 34m
Philadelphia
Mon 1/5
11:55 am-5:38 pm
1 stop6h 43m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Thu 1/1
8:51 am-2:07 pm
1 stop4h 16m
Philadelphia
Thu 1/1
6:34 pm-8:04 pm
Nonstop2h 30m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Mon 12/8
5:42 pm-11:57 pm
1 stop5h 15m
Philadelphia
Wed 12/10
9:39 am-1:50 pm
1 stop5h 11m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from Chicago O'Hare Intl Airport to Philadelphia, you should look to book at least 77 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Philadelphia (average of $37). Flying from Chicago O'Hare Intl Airport to Philadelphia in July is currently the most expensive (average of $104). 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.
One of the essential ways to save on airfare from Chicago O'Hare Intl Airport to Philadelphia is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 53% on airfare.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Philadelphia flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
About 21% of weekly flights between Chicago and Philadelphia have experienced delays in the past year, with the average delay time being 137 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Aer Lingus have had the lowest number of delays on this route, with no flights being classified as delayed.
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$260 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$76 | Average$173 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$477 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$149 | Average$325 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$160 | Average$300 | FlexibilityNo cancel fee | On-time71% |