Flight Reliability
AS 1227 · Alaska Airlines
Seattle → Austin (SEA–AUS)87% of its flights flew this route. The rest (SJC–SEA) are included in these numbers.
- 63%
- Arrive within 15 minutes
- 18 min
- Average arrival delay
- 0%
- Cancelled
- 11 min
- Median arrival delay
Based on 79 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AS 1227 departing between 12–3 PM arrived on time 70% of the time, versus 62% between 9 PM–12 AM.
Mondays have been rough.
AS 1227 arrived on time 92% of the time on Tuesdays and just 42% on Mondays. That gap is worth planning around.
Well behind the SEA–AUS route.
AS 1227 arrived on time 63% of the time, versus 79% across the SEA–AUS route.
Well behind the Alaska Airlines network.
AS 1227 arrived on time 63% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon42%(12 flights)
- Tue92%(12 flights)
- Wed73%(11 flights)
- Thu82%(11 flights)
- Fri46%(11 flights)
- Sat50%(10 flights)
- Sun58%(12 flights)
- 12–3 PM70%(10 flights)
- 9 PM–12 AM62%(69 flights)
Jun 59% → Aug 79% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 59% | 29 |
| July 2025 | 58% | 31 |
| August 2025 | 79% | 19 |
- Departures on time
- 65%
- Diverted
- 0%
- Flights flown
- 79
- Months covered
- 3
Same route, other flights
Keep nerding
Based on 79 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.