Flight Reliability
AS 709 · Alaska Airlines
San Diego → Seattle (SAN–SEA)97% of its flights flew this route. The rest (HNL–SEA) are included in these numbers.
- 90%
- Arrive within 15 minutes
- 3 min early
- Average arrival delay
- 1.9%
- Cancelled
- 11 min early
- Median arrival delay
Based on 158 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
AS 709 arrived on time 95% of the time on Wednesdays. On Fridays: 84%.
Better than the SAN–SEA route average.
AS 709 arrived on time 90% of the time, versus 81% across the SAN–SEA route.
Better than the Alaska Airlines network average.
AS 709 arrived on time 90% of the time, versus 80% across the Alaska Airlines network.
Recent months have been rougher.
AS 709 arrived on time 86% of the time over the last three months in the data, compared with 94% in the three months before that.
The breakdown
- Mon85%(26 flights)
- Tue95%(19 flights)
- Wed95%(20 flights)
- Thu92%(24 flights)
- Fri84%(25 flights)
- Sat91%(21 flights)
- Sun90%(20 flights)
- 6–9 AM89%(151 flights)
- 12–3 PM—(4 flights)
Nov 90% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 90% | 10 |
| December 2025 | 94% | 16 |
| January 2026 | 87% | 31 |
| February 2026 | 100% | 25 |
| March 2026 | 82% | 22 |
| April 2026 | 91% | 21 |
| May 2026 | 87% | 30 |
- Departures on time
- 92%
- Diverted
- 0%
- Flights flown
- 155
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 158 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.