Flight Reliability
AS 236 · Alaska Airlines
Portland → San Francisco (PDX–SFO)93% of its flights flew this route. The rest (FAI–SEA) are included in these numbers.
84
Pretty Reliable
WanderNerd Reliability Score
- 79%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 0.7%
- Cancelled
- 7 min early
- Median arrival delay
Based on 147 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
AS 236 departing between 6–9 AM arrived on time 100% of the time, versus 50% between 9 PM–12 AM.
Sunday scaries are real for this one.
AS 236 arrived on time 91% of the time on Thursdays and just 68% on Sundays. That gap is worth planning around.
The breakdown
- Mon73%(22 flights)
- Tue81%(26 flights)
- Wed87%(23 flights)
- Thu91%(23 flights)
- Fri70%(23 flights)
- Sat—(4 flights)
- Sun68%(25 flights)
- 6–9 AM100%(11 flights)
- 12–3 PM77%(52 flights)
- 3–6 PM85%(65 flights)
- 9 PM–12 AM50%(18 flights)
68%
May
Jun 100% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 100% | 11 |
| November 2025 | 94% | 18 |
| December 2025 | 59% | 17 |
| January 2026 | 79% | 24 |
| February 2026 | 83% | 23 |
| March 2026 | 77% | 17 |
| April 2026 | 82% | 11 |
| May 2026 | 68% | 19 |
- Departures on time
- 78%
- Diverted
- 0%
- Flights flown
- 146
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 147 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.