Flight OddsUA660 ORD → SAN
United Airlines · Chicago, IL to San Diego, CA · 365 flights observed, 2025-07-01 to 2026-06-30 · 1,723 mi
UA660 covers more than one route in the data window — the stats below are for ORD → SAN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-9 min
90th percentile
+29 min
Cancellation rate
0%
How often is UA660 on time?
Across 365 flights on ORD → SAN from 2025-07-01 to 2026-06-30, UA660 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +29 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 | 307 | 84% |
| 16-30 min | 25 | 7% |
| 31-60 min | 14 | 4% |
| 61-120 min | 9 | 2% |
| 2+ hrs | 10 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 87% | -1 min |
| 2025-08 | 31 | 87% | -5 min |
| 2025-09 | 30 | 87% | +1 min |
| 2025-10 | 31 | 74% | +12 min |
| 2025-11 | 30 | 87% | -9 min |
| 2025-12 | 31 | 65% | +25 min |
| 2026-01 | 31 | 74% | +16 min |
| 2026-02 | 28 | 96% | -13 min |
| 2026-03 | 31 | 94% | -18 min |
| 2026-04 | 30 | 80% | +3 min |
| 2026-05 | 31 | 90% | -9 min |
| 2026-06 | 30 | 90% | -7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 52 | 87% |
| Tue | 53 | 92% |
| Wed | 52 | 85% |
| Thu | 52 | 87% |
| Fri | 52 | 77% |
| Sat | 52 | 85% |
| Sun | 52 | 77% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…