ORD to PHL flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Philadelphia International Airport · 678 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or PHL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Philadelphia (PHL) arrived on time 72% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.2% were cancelled, and 13% arrived an hour or more late.
- United Airlines was the most punctual airline here (73% on time); American Airlines was the least (72%).
- Departures scheduled around 5am did best (90% on time); around 5pm did worst (58%).
- Tuesday was the most reliable day to fly (77% on time) and Monday the least (66%).
- The largest source of delay minutes was late-arriving aircraft (50%).
Which airline is most on time from ORD to PHL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 81% | 0.0% | 9 min | 3.7% | 27 |
| United Airlines | 73% | 1.7% | 23 min | 11.5% | 1,813 |
| American Airlines | 72% | 4.0% | 27 min | 12.8% | 2,975 |
| Frontier Airlines | 60% | 4.7% | 53 min | 22.8% | 193 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am90%212 flights
- 6am83%349 flights
- 7am89%251 flights
- 8am77%463 flights
- 9am80%244 flights
- 10am70%63 flights
- 11am75%686 flights
- 1pm74%156 flights
- 2pm68%630 flights
- 3pm70%166 flights
- 4pm60%218 flights
- 5pm58%226 flights
- 6pm61%513 flights
- 7pm67%180 flights
- 8pm60%244 flights
- 9pm67%373 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday66%4.0% cancelled
- Tuesday77%4.1% cancelled
- Wednesday75%1.7% cancelled
- Thursday72%2.3% cancelled
- Friday71%1.1% cancelled
- Saturday73%3.5% cancelled
- Sunday70%5.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft50%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion18%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather82%
- Airline (crew, maintenance, cleaning, fueling)9%
- Air traffic control & airport congestion9%
- Security0%
ORD to PHL: common questions
- How often are ORD to PHL flights on time?
- 72% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Philadelphia cancelled?
- 3.2% of scheduled flights were cancelled (159 of 5,008).
- How long are typical delays?
- Across all flights the average arrival delay was 26 min (early arrivals count as zero). Flights that were late arrived 91 min behind schedule on average, and 12.6% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 26 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PHL to ORD — 73% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → PHL, nonstop flights by US airlines that report to the DOT. How we calculate this.