Flight Reliability
AS 235 · Alaska Airlines
San Francisco → Portland (SFO–PDX)94% of its flights flew this route. The rest (HNL–SEA, SEA–ORD) are included in these numbers.
- 68%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 0.5%
- Cancelled
- 5 min early
- Median arrival delay
Based on 217 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
AS 235 departing between 9 AM–12 PM arrived on time 72% of the time, versus 54% between 12–3 PM.
Friday is doing you no favors.
AS 235 arrived on time 82% of the time on Tuesdays and just 55% on Fridays. That gap is worth planning around.
Lagging the SFO–PDX route.
AS 235 arrived on time 68% of the time, versus 81% across the SFO–PDX route.
Lagging the Alaska Airlines network.
AS 235 arrived on time 68% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon59%(32 flights)
- Tue82%(33 flights)
- Wed64%(33 flights)
- Thu77%(31 flights)
- Fri55%(31 flights)
- Sat67%(21 flights)
- Sun69%(35 flights)
- 9 AM–12 PM72%(169 flights)
- 12–3 PM54%(46 flights)
- 3–6 PM—(1 flights)
Jun 55% → May 32% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 55% | 11 |
| November 2025 | 78% | 27 |
| December 2025 | 59% | 29 |
| January 2026 | 80% | 30 |
| February 2026 | 92% | 25 |
| March 2026 | 93% | 28 |
| April 2026 | 50% | 28 |
| May 2026 | 32% | 31 |
- Departures on time
- 62%
- Diverted
- 0%
- Flights flown
- 216
- 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.