Flight Reliability
AS 227 · Alaska Airlines
New York → San Francisco (JFK–SFO)97% of its flights flew this route. The rest (FAI–SEA) are included in these numbers.
83
Pretty Reliable
WanderNerd Reliability Score
- 86%
- Arrive within 15 minutes
- 4 min early
- Average arrival delay
- 2.6%
- Cancelled
- 11 min early
- Median arrival delay
Based on 349 historical flights. Data through May 2026.
What the data says
Mornings have a slight edge.
Departures between 9 AM–12 PM arrived on time 88% of the time, against 84% between 12–3 PM.
Friday is doing you no favors.
AS 227 arrived on time 94% of the time on Saturdays. On Fridays: 80%.
Better than the JFK–SFO route average.
AS 227 arrived on time 86% of the time, versus 76% across the JFK–SFO route.
A bit ahead of the Alaska Airlines network.
AS 227 arrived on time 86% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon82%(50 flights)
- Tue87%(46 flights)
- Wed89%(45 flights)
- Thu90%(51 flights)
- Fri80%(51 flights)
- Sat94%(46 flights)
- Sun84%(50 flights)
- 9 AM–12 PM88%(211 flights)
- 12–3 PM84%(128 flights)
94%
May
Jun 79% → May 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 79% | 29 |
| July 2025 | 90% | 31 |
| August 2025 | 94% | 31 |
| September 2025 | 97% | 29 |
| October 2025 | 80% | 30 |
| November 2025 | 87% | 30 |
| December 2025 | 77% | 30 |
| January 2026 | 78% | 18 |
| February 2026 | 84% | 19 |
| March 2026 | 87% | 31 |
| April 2026 | 87% | 30 |
| May 2026 | 94% | 31 |
- Departures on time
- 89%
- Diverted
- 0.3%
- Flights flown
- 339
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 349 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.