About 1 in 9 AS 3440 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (11%); 3.2% were cancelled. The typical flight landed 10 minutes early.
AS 3440: SFO → SNA
Scheduled to leave San Francisco at 6:50 a.m. local time, operated by SkyWest as OO 3440. Over the past year it arrived on time 89% of the time (217 flights), better than other AS flights on the route at that hour (75%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 33 | 88% |
| Tuesday | 32 | 100% |
| Wednesday | 33 | 88% |
| Thursday | 32 | 91% |
| Friday | 32 | 91% |
| Saturday | 32 | 84% |
| Sunday | 23 | 83% |
Why it was late
All flights SFO → SNA · Connecting off AS 3440? Check the risk
AS 3440: SNA → SFO
Scheduled to leave Santa Ana at 9:12 a.m. local time, operated by SkyWest as OO 3440. Over the past year it arrived on time 50% of the time (173 flights), worse than other AS flights on the route at that hour (54%). Last seen in the data Jun 24, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 25 | 44% |
| Tuesday | 23 | 57% |
| Wednesday | 25 | 44% |
| Thursday | 26 | 42% |
| Friday | 25 | 52% |
| Saturday | 24 | 54% |
| Sunday | 25 | 60% |
Why it was late
All flights SNA → SFO · Connecting off AS 3440? Check the risk
Questions
How often is AS 3440 from SFO to SNA late?
Alaska Airlines 3440 from San Francisco, CA to Santa Ana, CA arrived 15 or more minutes late, was diverted or was cancelled on 11% of 217 scheduled flights between September 2025 and August 2026. 3.2% were cancelled.
How often is AS 3440 from SNA to SFO late?
Alaska Airlines 3440 from Santa Ana, CA to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 50% of 173 scheduled flights between September 2025 and August 2026. 1.7% 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.