Best Time to Fly HOU to MEM: On-Time Stats by Hour & Airline
William P Hobby → Memphis International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.1% of Houston (HOU) to Memphis (MEM) flights arrived on time (830 scheduled flights). That is 3.5 points below the national 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 (81% on time) and June the worst month (59%).
The cancellation rate was 1.3% (US average 1.8%).
HOU to MEM 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 | 74.1% | 46 min | 1.3% | 830 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly HOU to MEM
On-time arrival % by scheduled departure hour (local time), 1,619 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 97.0% | 2.9% | 34 |
| 10am–11am | 81.9% | 1.2% | 326 |
| 11am–12pm | 90.0% | 0.9% | 221 |
| 12pm–1pm | 90.7% | 0.0% | 54 |
| 1pm–2pm | 80.0% | 0.0% | 45 |
| 2pm–3pm | 60.0% | 0.8% | 126 |
| 3pm–4pm | 70.2% | 0.0% | 67 |
| 4pm–5pm | 72.7% | 0.0% | 33 |
| 5pm–6pm | 53.9% | 0.0% | 52 |
| 6pm–7pm | 77.4% | 1.7% | 230 |
| 7pm–8pm | 77.8% | 1.2% | 161 |
| 8pm–9pm | 65.2% | 0.4% | 246 |
| 9pm–10pm | Limited data | 23 | |
| 10pm–11pm | Limited data | 1 | |
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 MEM
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 | 29 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 75.0% | -3.3 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 67.3% | -11.0 pts | 1.0% | 298 |
| All other days | 78.3% | — | 1.0% | 1,232 |
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).