Route
SDF → BWI
Louisville Muhammad Ali International Airport Baltimore/Washington International Thurgood Marshall Airport
How punctual is this route?
- On-time arrivals
- 86.7%
- Less than 15 minutes late
- Cancelled
- 1.8%
- Of scheduled flights
- Average delay when late
- 69 min
- Flights arriving 15+ minutes late
- Flights tracked
- 880
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 38%
- Late-arriving aircraft 33%
- Air traffic control & airport 27%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.0% | 77 |
| October 2025 | 86.3% | 95 |
| November 2025 | 91.4% | 74 |
| December 2025 | 86.2% | 66 |
| January 2026 | 94.9% | 63 |
| February 2026 | 94.4% | 56 |
| March 2026 | 82.0% | 62 |
| April 2026 | 83.8% | 74 |
| May 2026 | 90.0% | 80 |
| June 2026 | 78.2% | 81 |
| July 2026 | 84.8% | 83 |
| August 2026 | 85.1% | 69 |
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 | 880 | 86.7% | 1.8% | 69 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN4285
5% late · 64 flights
-
WN4612
12% late · 61 flights
-
WN3478
4% late · 58 flights
-
WN3479
6% late · 58 flights
-
WN4186
0% late · 58 flights
-
WN4209
22% late · 36 flights
-
WN4416
9% late · 33 flights
-
WN2668
0% late · 31 flights
-
WN479
6% late · 31 flights
-
WN1267
4% late · 27 flights
-
WN16
21% late · 24 flights
-
WN1654
4% late · 24 flights
-
WN3519
4% late · 24 flights
-
WN2413
22% late · 23 flights
-
WN1909
32% late · 22 flights
-
WN1539
29% late · 21 flights
-
WN4286
19% late · 21 flights
-
WN1925
40% late · 20 flights
-
WN3329
28% late · 20 flights
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