Flight Reliability
AS 1121 · Alaska Airlines
Hilo → Honolulu (ITO–HNL)84% of its flights flew this route. The rest (LAX–GEG) are included in these numbers.
- 79%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 2.2%
- Cancelled
- 1 min early
- Median arrival delay
Based on 139 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
AS 1121 departing between 6–9 PM arrived on time 85% of the time, versus 72% between 9 PM–12 AM.
Sunday scaries are real for this one.
AS 1121 arrived on time 94% of the time on Tuesdays and just 67% on Sundays. That gap is worth planning around.
A bit behind the ITO–HNL route.
AS 1121 arrived on time 79% of the time, versus 85% across the ITO–HNL route.
Ticking up lately.
AS 1121 arrived on time 83% of the time over the last three months in the data, compared with 79% in the three months before that.
The breakdown
- Mon90%(19 flights)
- Tue94%(18 flights)
- Wed80%(20 flights)
- Thu90%(19 flights)
- Fri70%(20 flights)
- Sat68%(19 flights)
- Sun67%(21 flights)
- 12–3 PM—(2 flights)
- 6–9 PM85%(81 flights)
- 9 PM–12 AM72%(53 flights)
Oct 95% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| October 2025 | 95% | 21 |
| January 2026 | 66% | 29 |
| February 2026 | 75% | 28 |
| March 2026 | 88% | 16 |
| April 2026 | 82% | 11 |
| May 2026 | 81% | 31 |
- Departures on time
- 81%
- Diverted
- 0%
- Flights flown
- 136
- Months covered
- 6
Same route, other flights
Keep nerding
Based on 139 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.