Best Time to Fly BWI to SDF: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.5% of Baltimore (BWI) to Louisville (SDF) flights arrived on time (890 scheduled flights). That is 2.9 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
February has been the best month (90% on time) and Sunday the weakest day of the week (71%).
2.1% of flights were cancelled, versus 1.8% nationally.
BWI to SDF 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 | 80.5% | 52 min | 2.1% | 890 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to SDF
On-time arrival % by scheduled departure hour (local time), 1,770 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | Limited data | 23 | |
| 9am–10am | 89.4% | 1.5% | 67 |
| 10am–11am | 87.0% | 1.1% | 366 |
| 11am–12pm | 89.3% | 0.8% | 263 |
| 12pm–1pm | Limited data | 9 | |
| 1pm–2pm | Limited data | 6 | |
| 2pm–3pm | Limited data | 29 | |
| 3pm–4pm | 72.7% | 0.8% | 118 |
| 4pm–5pm | 77.3% | 0.0% | 88 |
| 5pm–6pm | 76.4% | 4.0% | 75 |
| 6pm–7pm | Limited data | 27 | |
| 7pm–8pm | 75.7% | 2.6% | 38 |
| 8pm–9pm | 82.2% | 1.7% | 177 |
| 9pm–10pm | 68.5% | 2.0% | 304 |
| 10pm–11pm | 64.7% | 7.2% | 180 |
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 SDF
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) | 76.7% | -5.2 pts | 1.6% | 61 |
| Summer peak (Jun 15 - Aug 15) | 66.2% | -15.6 pts | 4.8% | 330 |
| All other days | 81.8% | — | 1.3% | 1,350 |
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).