Best Time to Fly BWI to BHM: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Birmingham-Shuttlesworth International
Data through July 2026 · Last updated October 18, 2026
336 flights were scheduled from Baltimore (BWI) to Birmingham (BHM) in the last 12 months, and 81.3% of those that flew arrived on time, 3.7 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (89% on time) and August the worst month (69%).
The cancellation rate was 0.9% (US average 1.8%).
BWI to BHM 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 | 81.3% | 49 min | 0.9% | 336 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to BHM
On-time arrival % by scheduled departure hour (local time), 672 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 87.5% | 0.0% | 64 |
| 9am–10am | 85.1% | 2.0% | 151 |
| 10am–11am | 91.7% | 0.9% | 110 |
| 11am–12pm | 84.6% | 0.0% | 40 |
| 12pm–1pm | Limited data | 14 | |
| 1pm–2pm | 80.6% | 0.0% | 73 |
| 2pm–3pm | 71.7% | 0.0% | 114 |
| 3pm–4pm | 80.0% | 1.5% | 66 |
| 4pm–5pm | Limited data | 24 | |
| 5pm–6pm | Limited data | 1 | |
| 6pm–7pm | Limited data | 14 | |
| 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 BWI to BHM
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 | 17 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 80.0% | -4.9 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 72.2% | -12.7 pts | 2.3% | 129 |
| All other days | 84.9% | — | 0.8% | 496 |
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).