Flight OddsUA4603 IAD → PWM
United Airlines · Washington, DC to Portland, ME · 55 flights observed, 2026-03-05 to 2026-04-29 · 493 mi
UA4603 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
91%
Median delay
-12 min
90th percentile
+5 min
Cancellation rate
2%
How often is UA4603 on time?
Across 55 flights on IAD → PWM from 2026-03-05 to 2026-04-29, UA4603 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +5 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 | 49 | 91% |
| 16-30 min | 1 | 2% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 3 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 26 | 92% | +18 min |
| 2026-04 | 28 | 89% | -1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 100% |
| Tue | 8 | 88% |
| Wed | 8 | 88% |
| Thu | 8 | 75% |
| Fri | 8 | 88% |
| Sat | 7 | 100% |
| Sun | 8 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…