Best Time to Fly BHM to BWI: On-Time Stats by Hour & Airline
Birmingham-Shuttlesworth International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.4% of Birmingham (BHM) to Baltimore (BWI) flights arrived on time (337 scheduled flights). That is 3.8 points above 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 (91% on time) and July the worst month (69%).
The cancellation rate was 1.2% (US average 1.8%).
BHM 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 | 81.4% | 66 min | 1.2% | 337 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BHM to BWI
On-time arrival % by scheduled departure hour (local time), 673 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 28 | |
| 6am–7am | Limited data | 3 | |
| 9am–10am | 94.1% | 0.0% | 51 |
| 10am–11am | 96.8% | 0.0% | 62 |
| 11am–12pm | Limited data | 27 | |
| 12pm–1pm | 78.9% | 2.2% | 92 |
| 1pm–2pm | Limited data | 23 | |
| 2pm–3pm | 75.8% | 2.0% | 152 |
| 3pm–4pm | 85.5% | 1.3% | 77 |
| 4pm–5pm | 81.0% | 2.1% | 97 |
| 5pm–6pm | Limited data | 29 | |
| 6pm–7pm | Limited data | 32 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BHM 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) | Limited data | 17 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 66.7% | -18.8 pts | 3.2% | 31 |
| Summer peak (Jun 15 - Aug 15) | 69.6% | -15.9 pts | 3.1% | 129 |
| All other days | 85.5% | — | 1.2% | 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).