About 1 in 3 AS 389 flights from Boston arrived 15+ minutes late, diverted or cancelled over the past year (32%); 1.3% were cancelled. The typical flight landed 3 minutes early.
AS 389: BOS → SAN
Scheduled to leave Boston at 4:33 p.m. local time. Over the past year it arrived on time 68% of the time (314 flights), worse than other AS flights on the route at that hour (73%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 67% |
| Tuesday | 42 | 76% |
| Wednesday | 39 | 64% |
| Thursday | 49 | 69% |
| Friday | 49 | 63% |
| Saturday | 34 | 74% |
| Sunday | 50 | 66% |
Why it was late
All flights BOS → SAN · Connecting off AS 389? Check the risk
Questions
How often is AS 389 from BOS to SAN late?
Alaska Airlines 389 from Boston, MA to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 32% of 314 scheduled flights between September 2025 and August 2026. 1.3% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Alaska Airlines for today's flight. Method.