Flight OddsUA3491 IAD → PWM
United Airlines · Washington, DC to Portland, ME · 137 flights observed, 2025-07-01 to 2025-12-01 · 493 mi
UA3491 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
96%
Median delay
-13 min
90th percentile
0 min
Cancellation rate
1%
How often is UA3491 on time?
Across 137 flights on IAD → PWM from 2025-07-01 to 2025-12-01, UA3491 arrived within 15 minutes of schedule 96% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived 0 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 129 | 96% |
| 16-30 min | 1 | 1% |
| 31-60 min | 5 | 4% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 97% | -10 min |
| 2025-08 | 31 | 94% | -6 min |
| 2025-09 | 27 | 100% | -15 min |
| 2025-10 | 20 | 90% | -9 min |
| 2025-11 | 26 | 96% | -8 min |
| 2025-12 | 1 | 100% | -22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 21 | 90% |
| Tue | 16 | 100% |
| Wed | 18 | 100% |
| Thu | 22 | 95% |
| Fri | 22 | 91% |
| Sat | 14 | 93% |
| Sun | 22 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…