Flight Reliability
AS 3251 · Alaska Airlines
Santa Ana → San Francisco (SNA–SFO)
84
Pretty Reliable
WanderNerd Reliability Score
- 93%
- Arrive within 15 minutes
- 5 min early
- Average arrival delay
- 3.6%
- Cancelled
- 10 min early
- Median arrival delay
Based on 279 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
AS 3251 arrived on time 100% of the time on Wednesdays and just 56% on Sundays. That gap is worth planning around.
Well ahead of the SNA–SFO route.
AS 3251 arrived on time 93% of the time, versus 74% across the SNA–SFO route.
Better than the Alaska Airlines network average.
AS 3251 arrived on time 93% of the time, versus 80% across the Alaska Airlines network.
Keep a backup plan handy.
AS 3251 was cancelled 3.6% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon95%(40 flights)
- Tue90%(41 flights)
- Wed100%(43 flights)
- Thu98%(41 flights)
- Fri96%(44 flights)
- Sat95%(42 flights)
- Sun56%(16 flights)
61%
May
Jun 96% → May 61% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 96% | 25 |
| July 2025 | 93% | 27 |
| August 2025 | 96% | 28 |
| September 2025 | 90% | 30 |
| October 2025 | 100% | 27 |
| November 2025 | 95% | 19 |
| December 2025 | 96% | 25 |
| January 2026 | 100% | 29 |
| February 2026 | 96% | 25 |
| March 2026 | 93% | 14 |
| May 2026 | 61% | 18 |
- Departures on time
- 94%
- Diverted
- 0.7%
- Flights flown
- 267
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 279 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.