Best Time to Fly HOU to MIA: On-Time Stats by Hour & Airline
William P Hobby → Miami International
Data through July 2026 · Last updated October 18, 2026
288 flights were scheduled from Houston (HOU) to Miami (MIA) in the last 12 months, and 50.0% of those that flew arrived on time, 27.6 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (73% on time) and July the worst month (44%).
The cancellation rate was 0.7% (US average 1.8%).
HOU to MIA 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 |
|---|---|---|---|---|
| Southwest Airlines | 50.0% | 50 min | 0.7% | 288 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly HOU to MIA
On-time arrival % by scheduled departure hour (local time), 564 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 2 | |
| 8am–9am | Limited data | 12 | |
| 9am–10am | Limited data | 25 | |
| 10am–11am | 81.0% | 0.0% | 58 |
| 11am–12pm | 72.2% | 0.0% | 91 |
| 12pm–1pm | Limited data | 23 | |
| 1pm–2pm | 75.0% | 0.0% | 44 |
| 2pm–3pm | 27.8% | 2.7% | 37 |
| 3pm–4pm | 37.5% | 1.5% | 65 |
| 4pm–5pm | Limited data | 5 | |
| 6pm–7pm | Limited data | 17 | |
| 7pm–8pm | 63.4% | 0.0% | 71 |
| 8pm–9pm | 51.3% | 1.3% | 79 |
| 9pm–10pm | 22.9% | 0.0% | 35 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on HOU to MIA
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) | Limited data | 8 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 14 | ||
| Summer peak (Jun 15 - Aug 15) | 51.0% | -13.9 pts | 0.7% | 150 |
| All other days | 64.9% | — | 0.3% | 392 |
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).