Best Time to Fly HOU to HRL: On-Time Stats by Hour & Airline
William P Hobby → Valley International
Data through July 2026 · Last updated October 18, 2026
1,181 flights were scheduled from Houston (HOU) to Harlingen/San Benito (HRL) in the last 12 months, and 76.1% of those that flew arrived on time, 1.5 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (85% on time) and June the worst month (64%).
The cancellation rate was 0.2% (US average 1.8%).
HOU to HRL 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 | 76.1% | 45 min | 0.2% | 1,181 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly HOU to HRL
On-time arrival % by scheduled departure hour (local time), 2,505 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 1 | |
| 7am–8am | 96.7% | 0.0% | 92 |
| 8am–9am | 93.3% | 1.9% | 318 |
| 9am–10am | 93.5% | 0.7% | 140 |
| 10am–11am | 86.7% | 0.8% | 129 |
| 11am–12pm | 82.5% | 0.0% | 97 |
| 12pm–1pm | 87.1% | 0.0% | 142 |
| 1pm–2pm | 88.3% | 0.7% | 138 |
| 2pm–3pm | 76.7% | 0.0% | 103 |
| 3pm–4pm | 73.3% | 0.0% | 131 |
| 4pm–5pm | 81.7% | 0.5% | 198 |
| 5pm–6pm | 68.6% | 0.0% | 118 |
| 6pm–7pm | 75.8% | 0.0% | 178 |
| 7pm–8pm | 81.6% | 5.0% | 40 |
| 8pm–9pm | 84.9% | 1.4% | 148 |
| 9pm–10pm | 67.2% | 0.4% | 251 |
| 10pm–11pm | 62.1% | 3.2% | 281 |
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 HRL
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) | 80.8% | -2.4 pts | 0.0% | 52 |
| Christmas & New Year (Dec 20 - Jan 3) | 74.1% | -9.1 pts | 2.7% | 111 |
| Summer peak (Jun 15 - Aug 15) | 68.5% | -14.7 pts | 0.2% | 427 |
| All other days | 83.2% | — | 1.1% | 1,915 |
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).