Flight Reliability
AS 758 · Alaska Airlines
San Francisco → Seattle (SFO–SEA)
83
Pretty Reliable
WanderNerd Reliability Score
- 77%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.5%
- Cancelled
- 4 min early
- Median arrival delay
Based on 206 historical flights. Data through May 2026.
What the data says
6–9 PM has a slight edge.
Departures between 6–9 PM arrived on time 79% of the time, against 73% between 3–6 PM.
Mondays have been rough.
AS 758 arrived on time 89% of the time on Tuesdays and just 61% on Mondays. That gap is worth planning around.
A bit behind the Alaska Airlines network.
AS 758 arrived on time 77% of the time, versus 80% across the Alaska Airlines network.
Recent months have been rougher.
AS 758 arrived on time 69% of the time over the last three months in the data, compared with 82% in the three months before that.
The breakdown
- Mon61%(31 flights)
- Tue89%(27 flights)
- Wed78%(27 flights)
- Thu77%(30 flights)
- Fri80%(30 flights)
- Sat75%(28 flights)
- Sun78%(32 flights)
- 3–6 PM73%(70 flights)
- 6–9 PM79%(135 flights)
68%
May
Nov 95% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 95% | 20 |
| December 2025 | 68% | 31 |
| January 2026 | 84% | 31 |
| February 2026 | 93% | 28 |
| March 2026 | 80% | 30 |
| April 2026 | 60% | 30 |
| May 2026 | 68% | 31 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 205
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 206 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.