Baltimore (BWI) to Louisville (SDF): On-Time Performance
Data through July 2026
When you fly BWI to SDF matters as much as anything else about the booking: the route swung from 96% on-time in February 2026 to just 58% in July 2025. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (88% vs 71%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 1.9%
- Flights/day
- 2.4
- last 12 months
- Duration
- 1h 47m
- scheduled
- Distance
- 495 mi
Monthly on-time trend
Best time to fly from BWI to SDF
Aim for departures around 11 a.m. (89% on-time); avoid 10 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 16 min |
| Tuesdaybest | 85% | 10 min |
| Wednesday | 84% | 9 min |
| Thursday | 80% | 9 min |
| Friday | 74% | 15 min |
| Saturday | 77% | 15 min |
| Sunday | 71% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations38%
- National airspace system11%
- Weather4%
Frequently asked questions
- How often are flights from BWI to SDF delayed?
- 22% of BWI–SDF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- What is the best time of day to fly from BWI to SDF?
- Departures around 11 a.m. have the best record (89% on-time), while departures around 10 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BWI to SDF?
- The scheduled BWI–SDF flight time averages 1h 47m over 495 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are BWI to SDF flights cancelled?
- 1.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from BWI to SDF?
- July 2025 was the roughest month in this dataset, with only 58% of arrivals on time. The best was February 2026 at 96%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 1,850 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.