Flight OddsUA4173 PWM → IAD
United Airlines · Portland, ME to Washington, DC · 53 flights observed, 2025-10-26 to 2025-12-17 · 493 mi
UA4173 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
46%
Median delay
+23 min
90th percentile
+250 min
Cancellation rate
2%
How often is UA4173 on time?
Across 53 flights on PWM → IAD from 2025-10-26 to 2025-12-17, UA4173 arrived within 15 minutes of schedule 46% of the time. The median arrival delay was +23 min, and the worst 10% of flights arrived +250 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 | 24 | 46% |
| 16-30 min | 6 | 12% |
| 31-60 min | 4 | 8% |
| 61-120 min | 5 | 10% |
| 2+ hrs | 13 | 25% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 17% | +78 min |
| 2025-11 | 29 | 59% | +48 min |
| 2025-12 | 17 | 35% | +111 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 29% |
| Tue | 8 | 38% |
| Wed | 8 | 88% |
| Thu | 7 | 43% |
| Fri | 7 | 29% |
| Sat | 7 | 71% |
| Sun | 8 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…