Flight OddsUA3438 PWM → IAD
United Airlines · Portland, ME to Washington, DC · 84 flights observed, 2025-07-01 to 2025-09-24 · 493 mi
UA3438 covers more than one route in the data window — the stats below are for PWM → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
94%
Median delay
-11 min
90th percentile
+8 min
Cancellation rate
2%
How often is UA3438 on time?
Across 84 flights on PWM → IAD from 2025-07-01 to 2025-09-24, UA3438 arrived within 15 minutes of schedule 94% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +8 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 | 77 | 94% |
| 16-30 min | 2 | 2% |
| 31-60 min | 1 | 1% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 1 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 97% | -6 min |
| 2025-08 | 29 | 93% | -5 min |
| 2025-09 | 24 | 92% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 92% |
| Tue | 12 | 100% |
| Wed | 13 | 100% |
| Thu | 11 | 100% |
| Fri | 12 | 92% |
| Sat | 10 | 90% |
| Sun | 12 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…