Flight OddsUA4544 IAD → PHL
United Airlines · Washington, DC to Philadelphia, PA · 95 flights observed, 2025-07-01 to 2025-10-25 · 135 mi
UA4544 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
89%
Median delay
-15 min
90th percentile
+15 min
Cancellation rate
2%
How often is UA4544 on time?
Across 95 flights on IAD → PHL from 2025-07-01 to 2025-10-25, UA4544 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -15 min, and the worst 10% of flights arrived +15 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 | 83 | 89% |
| 16-30 min | 3 | 3% |
| 31-60 min | 1 | 1% |
| 61-120 min | 4 | 4% |
| 2+ hrs | 2 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 25 | 80% | +18 min |
| 2025-08 | 20 | 95% | -7 min |
| 2025-09 | 23 | 91% | -11 min |
| 2025-10 | 25 | 92% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 15 | 80% |
| Tue | 15 | 80% |
| Wed | 17 | 94% |
| Thu | 16 | 94% |
| Fri | 17 | 100% |
| Sat | 5 | 80% |
| Sun | 8 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…