Flight profile · United Airlines
UA668
San Juan (SJU) to Houston (IAH) · scheduled 2:55 PM – 6:46 PM
How UA668 performs
1,096 operations, 2023-07-01 to 2026-06-30.
UA668 arrived on time 75.7% of the time, against 84.0% for all SJU → IAH flights — this specific departure is 8.3 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 9.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,096 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA668 | 75.7% | 1.00% | -1 min | 6.8% | 1,096 |
| United Airlines on SJU → IAH | 85.3% | 0.90% | -10 min | 4.4% | 2,450 |
| All SJU → IAH flights | 84.0% | 1.11% | -9 min | 5.0% | 2,784 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does UA668 run worse on particular days?
Tuesday is historically the most reliable day and Saturday the least, a gap of 8.5 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Data and methodology
Calculated by FlyerIntel from 1,096 records of UA668 operating SJU → IAH, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.