Flight OddsUA4508 IAD → PWM
United Airlines · Washington, DC to Portland, ME · 32 flights observed, 2026-03-29 to 2026-04-29 · 493 mi
UA4508 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
81%
Median delay
-7 min
90th percentile
+35 min
Cancellation rate
0%
How often is UA4508 on time?
Across 32 flights on IAD → PWM from 2026-03-29 to 2026-04-29, UA4508 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +35 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 | 26 | 81% |
| 16-30 min | 2 | 6% |
| 31-60 min | 2 | 6% |
| 61-120 min | 1 | 3% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 3 | 100% | -11 min |
| 2026-04 | 29 | 79% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 60% |
| Tue | 5 | 80% |
| Wed | 5 | 60% |
| Thu | 4 | 75% |
| Fri | 4 | 100% |
| Sat | 4 | 100% |
| Sun | 5 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…