Flight Reliability
AS 1390 · Alaska Airlines
Seattle → Los Angeles (SEA–LAX)
81
Pretty Reliable
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 0%
- Cancelled
- 0 min
- Median arrival delay
Based on 115 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
AS 1390 arrived on time 91% of the time on Mondays and just 53% on Thursdays. That gap is worth planning around.
Lagging the SEA–LAX route.
AS 1390 arrived on time 73% of the time, versus 84% across the SEA–LAX route.
Lagging the Alaska Airlines network.
AS 1390 arrived on time 73% of the time, versus 80% across the Alaska Airlines network.
It basically never cancels.
Out of 115 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon91%(21 flights)
- Tue—(8 flights)
- Wed—(8 flights)
- Thu53%(17 flights)
- Fri78%(23 flights)
- Sat65%(17 flights)
- Sun71%(21 flights)
84%
May
Dec 47% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 47% | 19 |
| February 2026 | 69% | 13 |
| March 2026 | 73% | 22 |
| April 2026 | 88% | 24 |
| May 2026 | 84% | 19 |
- Departures on time
- 76%
- Diverted
- 0%
- Flights flown
- 115
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 115 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.