Flight OddsUA4563 IAD → PHL
United Airlines · Washington, DC to Philadelphia, PA · 83 flights observed, 2026-01-06 to 2026-04-28 · 135 mi
UA4563 covers more than one route in the data window — the stats below are for IAD → PHL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
93%
Median delay
-13 min
90th percentile
+10 min
Cancellation rate
2%
How often is UA4563 on time?
Across 83 flights on IAD → PHL from 2026-01-06 to 2026-04-28, UA4563 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +10 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 75 | 93% |
| 16-30 min | 1 | 1% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 4 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 19 | 84% | +15 min |
| 2026-02 | 23 | 96% | -7 min |
| 2026-03 | 25 | 92% | +19 min |
| 2026-04 | 14 | 100% | -16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 13 | 92% |
| Tue | 11 | 100% |
| Wed | 12 | 92% |
| Thu | 15 | 93% |
| Fri | 15 | 93% |
| Sat | 12 | 92% |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…