FlightRecord

Baltimore (BWI) to Louisville (SDF): On-Time Performance

Data through May 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
1.6%
Flights/day
2.4
last 12 months
Duration
1h 47m
scheduled
Distance
495 mi

Monthly on-time trend

Monthly on-time percentage for BWI to SDF flights50%75%100%June 2024: 74% on-time (81 flights)74Jun 2024July 2024: 59% on-time (80 flights)59August 2024: 67% on-time (80 flights)67September 2024: 82% on-time (77 flights)82Sep 2024October 2024: 78% on-time (86 flights)78November 2024: 86% on-time (73 flights)86December 2024: 82% on-time (67 flights)82Dec 2024January 2025: 83% on-time (63 flights)83February 2025: 84% on-time (56 flights)84March 2025: 85% on-time (62 flights)85Mar 2025April 2025: 78% on-time (72 flights)78May 2025: 76% on-time (80 flights)76June 2025: 73% on-time (83 flights)73Jun 2025July 2025: 58% on-time (81 flights)58August 2025: 80% on-time (80 flights)80September 2025: 88% on-time (77 flights)88Sep 2025October 2025: 79% on-time (95 flights)79November 2025: 84% on-time (73 flights)84December 2025: 80% on-time (66 flights)80Dec 2025January 2026: 85% on-time (63 flights)85February 2026: 96% on-time (56 flights)96March 2026: 85% on-time (62 flights)85Mar 2026April 2026: 76% on-time (74 flights)76May 2026: 70% on-time (80 flights)70

Best time to fly from BWI to SDF

Aim for departures around 11 a.m. (89% on-time); avoid 10 p.m. departures (63%).

On-time percentage by scheduled departure hour, BWI to SDF8 a.m.: 86% on-time (42 flights)89 a.m.: 88% on-time (76 flights)910 a.m.: 87% on-time (328 flights)1011 a.m.: 89% on-time (264 flights)112 p.m.: 68% on-time (25 flights)143 p.m.: 71% on-time (126 flights)154 p.m.: 73% on-time (96 flights)165 p.m.: 79% on-time (61 flights)176 p.m.: 78% on-time (28 flights)187 p.m.: 66% on-time (56 flights)198 p.m.: 79% on-time (200 flights)209 p.m.: 68% on-time (287 flights)2110 p.m.: 63% on-time (154 flights)22scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday80%14 min
Tuesdaybest86%9 min
Wednesday84%10 min
Thursday79%9 min
Friday74%15 min
Saturday76%14 min
Sunday71%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 aircraft46%
  • Airline operations39%
  • 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 2024-06 and 2026-05. 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 (63%). 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?
1.6% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below 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 1,767 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.