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 | $113 (Kiwi.com) |
One-way from | $61 (Cheapflightsfares) |
Popular in | March |
Cheapest in | October |
Average price | $299 |
Good round-trip deal | $180 or less |
Good one-way deal | $126 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 12/31
2:15 pm-5:30 pm
Nonstop2h 15m
Philadelphia
Mon 1/5
3:40 pm-10:49 am
1 stop20h 09m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 12/31
6:15 pm-9:31 pm
Nonstop2h 16m
Philadelphia
Thu 1/1
6:35 am-8:03 am
Nonstop2h 28m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 1/21
11:20 am-2:31 pm
Nonstop2h 11m
Philadelphia
Sat 1/24
6:30 am-7:59 am
Nonstop2h 29m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 1/7
4:49 pm-12:51 am
1 stop7h 02m
Philadelphia
Sat 1/10
5:05 am-11:35 am
1 stop7h 30m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Sun 1/18
11:20 am-2:31 pm
Nonstop2h 11m
Philadelphia
Sun 1/25
1:10 pm-2:40 pm
Nonstop2h 30m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 2/18
6:02 pm-8:12 am
2 stops13h 10m
Philadelphia
Wed 2/25
11:40 am-4:52 pm
1 stop6h 12m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Fri 1/30
5:26 pm-8:25 pm
Nonstop1h 59m
Philadelphia
Sun 2/1
10:57 am-12:35 pm
Nonstop2h 38m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Sat 1/17
2:30 pm-5:34 pm
Nonstop2h 04m
Philadelphia
Mon 1/19
6:30 am-7:59 am
Nonstop2h 29m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 12/31
2:15 pm-5:30 pm
Nonstop2h 15m
Philadelphia
Mon 1/5
7:18 pm-8:31 am
2 stops38h 13m
ChicagoPhiladelphia
ORD - PHL
ORDPHL
Chicago O'Hare Intl
Wed 1/21
6:50 am-11:43 am
1 stop3h 53m
Philadelphia
Fri 1/30
6:00 am-9:41 am
1 stop4h 41m
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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 50% 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 19% of weekly flights between Chicago and Philadelphia have experienced delays in the past year, with the average delay time being 138 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, United Airlines have had the lowest number of delays on this route, with just 17% of flights being delayed.
Boarding
Comfort
Overall
Entertainment
Food
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Comfort
Overall
Entertainment
Food
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Comfort
Overall
Entertainment
Food
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Comfort
Overall
Entertainment
Food
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Comfort
Overall
Entertainment
Food
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Comfort
Overall
Entertainment
Food
Crew
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$260 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$77 | Average$174 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$477 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$149 | Average$323 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$300 | FlexibilityNo cancel fee | On-time71% |