Flight OddsUA3517 IAD → PWM
United Airlines · Washington, DC to Portland, ME · 116 flights observed, 2025-07-01 to 2025-10-24 · 493 mi
UA3517 covers more than one route in the data window — the stats below are for IAD → PWM, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-13 min
90th percentile
+31 min
Cancellation rate
3%
How often is UA3517 on time?
Across 116 flights on IAD → PWM from 2025-07-01 to 2025-10-24, UA3517 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +31 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 94 | 84% |
| 16-30 min | 6 | 5% |
| 31-60 min | 5 | 4% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 5 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 72% | +39 min |
| 2025-08 | 30 | 90% | -11 min |
| 2025-09 | 29 | 86% | -11 min |
| 2025-10 | 24 | 88% | -6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 15 | 100% |
| Tue | 16 | 69% |
| Wed | 16 | 88% |
| Thu | 17 | 65% |
| Fri | 17 | 88% |
| Sat | 15 | 87% |
| Sun | 16 | 94% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…