Best Time to Fly MDW to HOU: On-Time Stats by Hour & Airline
Chicago Midway International → William P Hobby
Data through July 2026 · Last updated October 18, 2026
1,857 flights were scheduled from Chicago (MDW) to Houston (HOU) in the last 12 months, and 74.2% of those that flew arrived on time, 3.4 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 (80% on time) and June the worst month (61%).
The cancellation rate was 1.2% (US average 1.8%).
MDW to HOU 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 | 74.2% | 48 min | 1.2% | 1,857 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to HOU
On-time arrival % by scheduled departure hour (local time), 3,681 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.9% | 0.4% | 250 |
| 6am–7am | 89.5% | 0.3% | 316 |
| 7am–8am | 83.1% | 0.0% | 279 |
| 8am–9am | 90.0% | 1.3% | 306 |
| 9am–10am | 90.3% | 0.0% | 93 |
| 10am–11am | 83.6% | 0.5% | 208 |
| 11am–12pm | 73.4% | 1.0% | 196 |
| 12pm–1pm | 69.6% | 0.0% | 160 |
| 1pm–2pm | 80.7% | 3.1% | 160 |
| 2pm–3pm | 66.5% | 0.0% | 167 |
| 3pm–4pm | 76.7% | 1.1% | 91 |
| 4pm–5pm | 74.0% | 0.9% | 106 |
| 5pm–6pm | 65.6% | 1.1% | 273 |
| 6pm–7pm | 56.3% | 0.9% | 217 |
| 7pm–8pm | 71.9% | 1.9% | 214 |
| 8pm–9pm | 79.6% | 1.2% | 253 |
| 9pm–10pm | 55.2% | 3.1% | 260 |
| 10pm–11pm | 63.0% | 3.0% | 132 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW to HOU
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) | 77.3% | -2.6 pts | 7.0% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.7% | -7.2 pts | 0.7% | 146 |
| Summer peak (Jun 15 - Aug 15) | 64.1% | -15.8 pts | 1.3% | 744 |
| All other days | 79.9% | — | 0.9% | 2,720 |
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).