Flight Reliability
AS 1139 · Alaska Airlines
SBA → Seattle (SBA–SEA)
54
A Little Dicey
WanderNerd Reliability Score
- 56%
- Arrive within 15 minutes
- 25 min
- Average arrival delay
- 0.7%
- Cancelled
- 11 min
- Median arrival delay
Based on 140 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
AS 1139 arrived on time 67% of the time on Saturdays and just 43% on Wednesdays. That gap is worth planning around.
Well behind the SBA–SEA route.
AS 1139 arrived on time 56% of the time, versus 79% across the SBA–SEA route.
Well behind the Alaska Airlines network.
AS 1139 arrived on time 56% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon52%(21 flights)
- Tue60%(20 flights)
- Wed43%(21 flights)
- Thu48%(21 flights)
- Fri60%(20 flights)
- Sat67%(15 flights)
- Sun67%(21 flights)
76%
Oct
Jun 43% → Oct 76% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 43% | 30 |
| July 2025 | 38% | 29 |
| August 2025 | 48% | 29 |
| September 2025 | 81% | 26 |
| October 2025 | 76% | 25 |
- Departures on time
- 68%
- Diverted
- 0%
- Flights flown
- 139
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 140 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.