Washington (IAD) to Philadelphia (PHL): On-Time Performance
Data through May 2026
Washington (IAD) to Philadelphia (PHL) is a thinner route than most in this dataset — 120 departures over the past year, roughly 2 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 82% arrived on time. Cancellations are the bigger caveat: 4% of scheduled flights never departed.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 4.0%
- Flights/day
- 0.33
- last 12 months
- Duration
- 1h 13m
- scheduled
- Distance
- 135 mi
Monthly on-time trend
Best time to fly from IAD to PHL
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 11 min |
| Tuesday | 88% | 6 min |
| Wednesdaybest | 89% | 5 min |
| Thursday | 82% | 6 min |
| Friday | 69% | 19 min |
| Saturday | 83% | 5 min |
| Sunday | 83% | 7 min |
Frequently asked questions
- How often are flights from IAD to PHL delayed?
- 18% of IAD–PHL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 9 minutes.
- How long is the flight from IAD to PHL?
- The scheduled IAD–PHL flight time averages 1h 13m over 135 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are IAD to PHL flights cancelled?
- 4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
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Based on 125 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.