Best Time to Fly MIA to SFO: On-Time Stats by Hour & Airline
Miami International → San Francisco International
Data through July 2026 · Last updated October 18, 2026
1,746 flights were scheduled from Miami (MIA) to San Francisco (SFO) in the last 12 months, and 70.0% of those that flew arrived on time, 7.6 points below the US average of 77.6%.
Among 2 airlines, United Airlines led with 72.1% on time and American Airlines was last with 68.8%.
Over 24 months, Tuesday was the most reliable day (81% on time) and July the worst month (63%).
The cancellation rate was 0.6% (US average 1.8%).
MIA 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 | 72.1% | 72 min | 0.3% | 613 |
| American Airlines | 68.8% | 65 min | 0.8% | 1,133 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to SFO
On-time arrival % by scheduled departure hour (local time), 3,456 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 98.6% | 0.0% | 73 |
| 7am–8am | 85.9% | 0.4% | 556 |
| 8am–9am | 87.2% | 0.4% | 680 |
| 9am–10am | Limited data | 1 | |
| 10am–11am | 93.8% | 0.0% | 32 |
| 11am–12pm | Limited data | 1 | |
| 1pm–2pm | Limited data | 1 | |
| 3pm–4pm | 67.5% | 0.0% | 123 |
| 4pm–5pm | 73.2% | 0.0% | 100 |
| 5pm–6pm | 62.8% | 0.5% | 597 |
| 6pm–7pm | 59.0% | 0.2% | 506 |
| 7pm–8pm | 62.9% | 0.8% | 637 |
| 8pm–9pm | 53.7% | 1.3% | 149 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA 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) | 73.5% | -1.0 pts | 0.0% | 68 |
| Christmas & New Year (Dec 20 - Jan 3) | 53.5% | -21.1 pts | 0.7% | 145 |
| Summer peak (Jun 15 - Aug 15) | 65.5% | -9.0 pts | 0.5% | 639 |
| All other days | 74.5% | — | 0.5% | 2,604 |
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).