Flight Reliability
AS 1305 · Alaska Airlines
Los Angeles → Seattle (LAX–SEA)96% of its flights flew this route. The rest (PDX–GEG) are included in these numbers.
- 79%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 2.7%
- Cancelled
- 4 min early
- Median arrival delay
Based on 301 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AS 1305 departing between 12–3 PM arrived on time 80% of the time, versus 55% between 9 PM–12 AM.
Wednesday is the weak spot.
AS 1305 arrived on time 88% of the time on Mondays. On Wednesdays: 74%.
A bit behind the LAX–SEA route.
AS 1305 arrived on time 79% of the time, versus 86% across the LAX–SEA route.
Recent months have been rougher.
AS 1305 arrived on time 71% of the time over the last three months in the data, compared with 83% in the three months before that.
The breakdown
- Mon88%(50 flights)
- Tue79%(47 flights)
- Wed74%(46 flights)
- Thu75%(47 flights)
- Fri76%(46 flights)
- Sat—(6 flights)
- Sun86%(51 flights)
- 9 AM–12 PM80%(170 flights)
- 12–3 PM80%(112 flights)
- 9 PM–12 AM55%(11 flights)
Jun 56% → May 78% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 56% | 25 |
| July 2025 | 76% | 25 |
| August 2025 | 80% | 25 |
| September 2025 | 92% | 24 |
| October 2025 | 88% | 24 |
| November 2025 | 96% | 25 |
| December 2025 | 92% | 25 |
| January 2026 | 79% | 24 |
| February 2026 | 79% | 24 |
| March 2026 | 77% | 26 |
| April 2026 | 57% | 23 |
| May 2026 | 78% | 23 |
- Departures on time
- 73%
- Diverted
- 0%
- Flights flown
- 293
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 301 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.