Flight OddsUA660 PHL → ORD
United Airlines · Philadelphia, PA to Chicago, IL · 119 flights observed, 2026-01-06 to 2026-06-30 · 678 mi
UA660 covers more than one route in the data window — the stats below are for PHL → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
89%
Median delay
-10 min
90th percentile
+19 min
Cancellation rate
4%
How often is UA660 on time?
Across 119 flights on PHL → ORD from 2026-01-06 to 2026-06-30, UA660 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +19 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 101 | 89% |
| 16-30 min | 8 | 7% |
| 31-60 min | 3 | 3% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 24 | 79% | -1 min |
| 2026-02 | 9 | 67% | -4 min |
| 2026-03 | 2 | 100% | -15 min |
| 2026-04 | 19 | 89% | +1 min |
| 2026-05 | 31 | 90% | -8 min |
| 2026-06 | 29 | 100% | -14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 76% |
| Tue | 15 | 87% |
| Wed | 13 | 100% |
| Thu | 16 | 100% |
| Fri | 17 | 82% |
| Sat | 18 | 89% |
| Sun | 18 | 89% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…