Flight OddsUA4538 PHL → IAD
United Airlines · Philadelphia, PA to Washington, DC · 15 flights observed, 2026-06-01 to 2026-06-24 · 135 mi
UA4538 covers more than one route in the data window — the stats below are for PHL → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
93%
Median delay
-16 min
90th percentile
0 min
Cancellation rate
0%
How often is UA4538 on time?
Across 15 flights on PHL → IAD from 2026-06-01 to 2026-06-24, UA4538 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -16 min, and the worst 10% of flights arrived 0 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 14 | 93% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 7% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-06 | 15 | 93% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 100% |
| Tue | 4 | 100% |
| Wed | 4 | 75% |
| Thu | 3 | 100% |
| Fri | No data | — |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…