Best Time to Fly KOA to SFO: On-Time Stats by Hour & Airline
Ellison Onizuka Kona International at Keahole → San Francisco International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 84.0% of Kona (KOA) to San Francisco (SFO) flights arrived on time (1,150 scheduled flights). That is 6.4 points above the national average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 87.4%, while Alaska Airlines trailed at 70.4%.
September has been the best month (95% on time) and Thursday the weakest day of the week (81%).
1.0% of flights were cancelled, versus 1.8% nationally.
KOA to SFO on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 87.4% | 68 min | 1.1% | 919 |
| Alaska Airlines | 70.4% | 61 min | 0.4% | 231 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly KOA to SFO
On-time arrival % by scheduled departure hour (local time), 1,867 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 100.0% | 0.0% | 72 |
| 8am–9am | Limited data | 1 | |
| 11am–12pm | 81.7% | 1.4% | 72 |
| 12pm–1pm | 83.1% | 1.4% | 73 |
| 1pm–2pm | 78.6% | 1.6% | 450 |
| 2pm–3pm | 81.4% | 0.9% | 337 |
| 3pm–4pm | 81.0% | 0.5% | 191 |
| 4pm–5pm | 74.6% | 0.0% | 64 |
| 5pm–6pm | 80.5% | 0.0% | 41 |
| 9pm–10pm | Limited data | 3 | |
| 10pm–11pm | 94.3% | 0.6% | 354 |
| 11pm–12am | 98.5% | 1.0% | 209 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on KOA to SFO
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 78.8% | -6.2 pts | 2.9% | 34 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.3% | -1.7 pts | 0.0% | 114 |
| Summer peak (Jun 15 - Aug 15) | 88.5% | +3.5 pts | 0.2% | 434 |
| All other days | 85.0% | — | 1.2% | 1,285 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).