Flight OddsUA4437 IAD → PWM
United Airlines · Washington, DC to Portland, ME · 10 flights observed, 2026-05-26 to 2026-06-24 · 493 mi
UA4437 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
100%
Median delay
-6 min
90th percentile
+7 min
Cancellation rate
0%
How often is UA4437 on time?
Across 10 flights on IAD → PWM from 2026-05-26 to 2026-06-24, UA4437 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +7 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 | 10 | 100% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 2 | 100% | +4 min |
| 2026-06 | 8 | 100% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 5 | 100% |
| Wed | 5 | 100% |
| Thu | No data | — |
| Fri | No data | — |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…