Route
BWI → SDF
Baltimore/Washington International Thurgood Marshall Airport Louisville Muhammad Ali International Airport
How punctual is this route?
- On-time arrivals
- 80.0%
- Less than 15 minutes late
- Cancelled
- 2.5%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 891
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 50%
- Airline (crew, maintenance, cleaning) 36%
- Air traffic control & airport 12%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 88.3% | 77 |
| October 2025 | 78.9% | 95 |
| November 2025 | 83.8% | 73 |
| December 2025 | 80.0% | 66 |
| January 2026 | 84.7% | 63 |
| February 2026 | 96.4% | 56 |
| March 2026 | 85.2% | 62 |
| April 2026 | 75.7% | 74 |
| May 2026 | 70.0% | 80 |
| June 2026 | 73.8% | 81 |
| July 2026 | 76.9% | 83 |
| August 2026 | 74.0% | 81 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 891 | 80.0% | 2.5% | 59 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN156
42% late · 60 flights
-
WN1036
5% late · 58 flights
-
WN1319
36% late · 58 flights
-
WN1388
9% late · 47 flights
-
WN3145
20% late · 46 flights
-
WN1908
19% late · 45 flights
-
WN1935
30% late · 44 flights
-
WN1297
12% late · 43 flights
-
WN2137
8% late · 40 flights
-
WN3211
31% late · 33 flights
-
WN1938
26% late · 31 flights
-
WN2189
13% late · 31 flights
-
WN1105
0% late · 30 flights
-
WN1536
7% late · 28 flights
-
WN4885
22% late · 27 flights
-
WN1317
42% late · 24 flights
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