Flight Reliability
AS 1338 · Alaska Airlines
Seattle → Los Angeles (SEA–LAX)
79
Usually Fine
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 0.6%
- Cancelled
- 4 min early
- Median arrival delay
Based on 172 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
AS 1338 arrived on time 91% of the time on Saturdays and just 48% on Thursdays. That gap is worth planning around.
Lagging the SEA–LAX route.
AS 1338 arrived on time 73% of the time, versus 84% across the SEA–LAX route.
Lagging the Alaska Airlines network.
AS 1338 arrived on time 73% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 1338 arrived on time 76% of the time over the last three months in the data, compared with 68% in the three months before that.
The breakdown
- Mon65%(26 flights)
- Tue73%(26 flights)
- Wed76%(21 flights)
- Thu48%(25 flights)
- Fri80%(25 flights)
- Sat91%(23 flights)
- Sun80%(25 flights)
75%
May
Nov 68% → May 75% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 68% | 28 |
| December 2025 | 62% | 29 |
| January 2026 | 74% | 31 |
| February 2026 | 79% | 28 |
| March 2026 | 75% | 16 |
| May 2026 | 75% | 24 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 171
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 172 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.