Flight profile · Alaska Airlines
AS389
Boston (BOS) to San Diego (SAN) · scheduled 4:36 PM – 9:00 PM
How AS389 performs
986 operations, 2023-07-01 to 2026-06-30.
AS389 arrived on time 70.9% of the time, against 76.3% for all BOS → SAN flights — this specific departure is 5.4 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 1.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 986 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS389 | 70.9% | 0.91% | -4 min | 9.5% | 986 |
| Alaska Airlines on BOS → SAN | 72.5% | 1.05% | -3 min | 8.2% | 1,329 |
| All BOS → SAN flights | 76.3% | 0.80% | -6 min | 6.7% | 4,875 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS389 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 10.6 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 986 records of AS389 operating BOS → SAN, 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.