Best Time to Fly HOU to BWI: On-Time Stats by Hour & Airline
William P Hobby → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
1,479 flights were scheduled from Houston (HOU) to Baltimore (BWI) in the last 12 months, and 74.5% of those that flew arrived on time, 3.1 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 (83% on time) and June the worst month (65%).
The cancellation rate was 1.4% (US average 1.8%).
HOU to BWI 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 | 74.5% | 47 min | 1.4% | 1,479 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly HOU to BWI
On-time arrival % by scheduled departure hour (local time), 2,938 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.6% | 0.8% | 475 |
| 6am–7am | 95.8% | 2.5% | 244 |
| 7am–8am | 91.7% | 0.0% | 109 |
| 8am–9am | 93.2% | 0.0% | 73 |
| 9am–10am | 81.8% | 1.5% | 67 |
| 10am–11am | 81.0% | 0.5% | 224 |
| 11am–12pm | 83.3% | 1.8% | 225 |
| 12pm–1pm | 79.2% | 1.3% | 78 |
| 1pm–2pm | 69.4% | 0.0% | 50 |
| 2pm–3pm | Limited data | 20 | |
| 3pm–4pm | 74.4% | 3.4% | 267 |
| 4pm–5pm | 53.6% | 1.4% | 141 |
| 5pm–6pm | 64.6% | 2.6% | 230 |
| 6pm–7pm | 75.4% | 2.1% | 187 |
| 7pm–8pm | 54.7% | 0.0% | 106 |
| 8pm–9pm | 63.6% | 1.6% | 366 |
| 9pm–10pm | 63.5% | 2.6% | 76 |
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 BWI
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) | 88.1% | +8.0 pts | 0.0% | 67 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.8% | -8.3 pts | 1.5% | 133 |
| Summer peak (Jun 15 - Aug 15) | 67.3% | -12.8 pts | 3.4% | 533 |
| All other days | 80.1% | — | 1.2% | 2,205 |
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).