Best Time to Fly SDF to BWI: On-Time Stats by Hour & Airline
Louisville Muhammad Ali International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.8% of Louisville (SDF) to Baltimore (BWI) flights arrived on time (891 scheduled flights). That is 9.2 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Monday was the most reliable day (92% on time) and July the worst month (79%).
The cancellation rate was 1.9% (US average 1.8%).
SDF 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 | 86.8% | 67 min | 1.9% | 891 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SDF to BWI
On-time arrival % by scheduled departure hour (local time), 1,772 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.4% | 2.0% | 440 |
| 6am–7am | 95.5% | 0.8% | 250 |
| 7am–8am | Limited data | 10 | |
| 8am–9am | 96.7% | 0.0% | 30 |
| 9am–10am | Limited data | 25 | |
| 10am–11am | 86.7% | 0.8% | 129 |
| 11am–12pm | 95.5% | 1.1% | 90 |
| 12pm–1pm | 86.9% | 1.6% | 62 |
| 1pm–2pm | Limited data | 25 | |
| 2pm–3pm | Limited data | 29 | |
| 3pm–4pm | 82.0% | 1.3% | 158 |
| 4pm–5pm | 79.3% | 3.5% | 226 |
| 5pm–6pm | 69.8% | 3.2% | 187 |
| 6pm–7pm | 65.0% | 0.0% | 61 |
| 7pm–8pm | Limited data | 26 | |
| 8pm–9pm | Limited data | 24 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SDF 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 | 29 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 80.0% | -7.9 pts | 1.6% | 61 |
| Summer peak (Jun 15 - Aug 15) | 78.8% | -9.1 pts | 3.9% | 331 |
| All other days | 87.9% | — | 1.6% | 1,351 |
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).