Flight OddsUA3551 PWM → ORD
United Airlines · Portland, ME to Chicago, IL · 56 flights observed, 2026-03-05 to 2026-04-29 · 900 mi
UA3551 covers more than one route in the data window — the stats below are for PWM → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
75%
Median delay
-14 min
90th percentile
+94 min
Cancellation rate
7%
How often is UA3551 on time?
Across 56 flights on PWM → ORD from 2026-03-05 to 2026-04-29, UA3551 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +94 min or later. 7% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 38 | 75% |
| 16-30 min | 5 | 10% |
| 31-60 min | 2 | 4% |
| 61-120 min | 3 | 6% |
| 2+ hrs | 3 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 25 | 64% | +35 min |
| 2026-04 | 26 | 85% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 17% |
| Tue | 8 | 75% |
| Wed | 8 | 100% |
| Thu | 7 | 71% |
| Fri | 7 | 71% |
| Sat | 8 | 75% |
| Sun | 7 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…