Flight Reliability
AS 1230 · Alaska Airlines
Seattle → Sacramento (SEA–SMF)
71
Usually Fine
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 2.1%
- Cancelled
- 0 min
- Median arrival delay
Based on 97 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
AS 1230 arrived on time 84% of the time on Fridays and just 67% on Wednesdays. That gap is worth planning around.
Lagging the SEA–SMF route.
AS 1230 arrived on time 72% of the time, versus 82% across the SEA–SMF route.
Lagging the Alaska Airlines network.
AS 1230 arrived on time 72% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon69%(16 flights)
- Tue70%(10 flights)
- Wed67%(12 flights)
- Thu68%(19 flights)
- Fri84%(19 flights)
- Sat—(1 flights)
- Sun72%(18 flights)
86%
Oct
Jun 63% → Oct 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 16 |
| July 2025 | 64% | 25 |
| August 2025 | 74% | 23 |
| September 2025 | 77% | 17 |
| October 2025 | 86% | 14 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 95
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 97 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.