Flight Reliability
UA 1509 · United Airlines
San Francisco → Honolulu (SFO–HNL)
93
Nerd Approved
WanderNerd Reliability Score
- 85%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 0%
- Cancelled
- 9 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
UA 1509 arrived on time 90% of the time on Tuesdays. On Sundays: 79%.
A bit ahead of the United Airlines network.
UA 1509 arrived on time 85% of the time, versus 79% across the United Airlines network.
It basically never cancels.
Out of 365 scheduled flights, only 0.0% were cancelled.
Slipping a little lately.
UA 1509 arrived on time 83% of the time over the last three months in the data, compared with 89% in the three months before that.
The breakdown
- Mon87%(52 flights)
- Tue90%(52 flights)
- Wed87%(52 flights)
- Thu87%(52 flights)
- Fri83%(52 flights)
- Sat85%(52 flights)
- Sun79%(53 flights)
84%
May
Jun 73% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 73% | 30 |
| July 2025 | 81% | 31 |
| August 2025 | 81% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 97% | 31 |
| November 2025 | 97% | 30 |
| December 2025 | 87% | 31 |
| January 2026 | 87% | 31 |
| February 2026 | 93% | 28 |
| March 2026 | 87% | 31 |
| April 2026 | 77% | 30 |
| May 2026 | 84% | 31 |
- Departures on time
- 83%
- Diverted
- 0%
- Flights flown
- 365
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 365 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.