Flight OddsUA3556 IAD → PWM
United Airlines · Washington, DC to Portland, ME · 21 flights observed, 2026-04-30 to 2026-05-20 · 493 mi
UA3556 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
90%
Median delay
-14 min
90th percentile
+8 min
Cancellation rate
0%
How often is UA3556 on time?
Across 21 flights on IAD → PWM from 2026-04-30 to 2026-05-20, UA3556 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +8 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 | 19 | 90% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 2 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 1 | 100% | -34 min |
| 2026-05 | 20 | 90% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 3 | 100% |
| Wed | 3 | 67% |
| Thu | 3 | 100% |
| Fri | 3 | 100% |
| Sat | 3 | 67% |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…