Flight Reliability
AS 1312 · Alaska Airlines
Portland → San Diego (PDX–SAN)100% of its flights flew this route. The rest (PHX–PDX) are included in these numbers.
83
Pretty Reliable
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.5%
- Cancelled
- 2 min
- Median arrival delay
Based on 217 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
AS 1312 arrived on time 90% of the time on Tuesdays and just 66% on Sundays. That gap is worth planning around.
Trending in the right direction.
AS 1312 arrived on time 86% of the time over the last three months in the data, compared with 72% in the three months before that.
The breakdown
- Mon73%(30 flights)
- Tue90%(31 flights)
- Wed84%(32 flights)
- Thu77%(30 flights)
- Fri71%(31 flights)
- Sat90%(29 flights)
- Sun66%(32 flights)
- 12–3 PM79%(214 flights)
- 3–6 PM—(1 flights)
77%
May
Nov 75% → May 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 75% | 28 |
| December 2025 | 68% | 31 |
| January 2026 | 70% | 30 |
| February 2026 | 79% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 93% | 29 |
| May 2026 | 77% | 31 |
- Departures on time
- 87%
- Diverted
- 0.5%
- Flights flown
- 215
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 217 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.