Louisville Muhammad Ali International in March 2025

84.8%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In March 2025, reporting carriers scheduled 1,905 domestic departures from Louisville Muhammad Ali International (SDF). 84.8% left less than 15 minutes late and 83.5% reached their destination on time; 1.2% were cancelled.

Nationally that month, 79.9% of flights departed on time and 79.3% arrived on time, so SDF departures were 4.9 points above the national departure figure.

A year earlier, in March 2024, the airport had 2,025 departures with 84.0% leaving on time: a change of +0.8 points, with flights down 6%.

Flights arriving at SDF that month were on time 78.5% of the time (1,904 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, national aviation system 30% and air carrier 23%.

On time 83.5%
Arrived 15+ minutes late 15.3%
Cancelled 1.2%
Diverted 0.1%

Every scheduled departure from SDF in March 2025, judged by arrival at the destination.

March 2025 against a year earlier, the airport's year and the nation

Measure	Mar 2025	Mar 2024	SDF, 12 months to Jul 2026	All reported flights, Mar 2025
Departed on time	84.8%	84.0%	80.0%	79.9%
Arrived on time	83.5%	83.2%	79.7%	79.3%
Cancelled	1.2%	0.4%	2.2%	1.2%
Average departure delay (late minutes only)	11.0 min	12.3 min	15.9 min	14.9 min
Scheduled departures a day	64	68	63	20,029
Scheduled departures	1,905	2,025	23,144	600,872

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	554	29%	87.9%	-3.4 min	0.2%
WN Southwest Airlines	455	24%	85.1%	2.9 min	0.9%
DL Delta Air Lines	208	11%	90.4%	-8.0 min	0.0%
AA American Airlines	177	9%	84.2%	-2.9 min	1.7%
OH PSA Airlines	147	8%	64.6%	18.8 min	4.1%
MQ Envoy Air	110	6%	74.5%	0.7 min	4.5%
OO SkyWest Airlines	109	6%	81.7%	2.0 min	0.9%
NK Spirit Airlines	59	3%	88.1%	13.2 min	1.7%
G4 Allegiant Air	55	3%	60.0%	19.5 min	1.8%
UA United Airlines	31	2%	90.3%	-4.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SDF–ATL	Louisville to Atlanta	239	90.0%	-7.1 min	0.0%
SDF–DFW	Louisville to Dallas/Fort Worth	173	78.6%	-1.2 min	3.5%
SDF–ORD	Louisville to Chicago	173	82.7%	-2.0 min	1.7%
SDF–CLT	Louisville to Charlotte	152	78.3%	8.1 min	2.6%
SDF–LGA	Louisville to New York	139	84.9%	-1.2 min	0.0%
SDF–DCA	Louisville to Washington	88	65.9%	13.3 min	3.4%
SDF–DTW	Louisville to Detroit	88	87.5%	-1.6 min	0.0%
SDF–EWR	Louisville to Newark	87	92.0%	-6.7 min	0.0%
SDF–MCO	Louisville to Orlando	87	80.5%	11.6 min	1.1%
SDF–MDW	Louisville to Chicago	80	82.5%	5.6 min	0.0%
SDF–BWI	Louisville to Baltimore	62	87.1%	0.7 min	1.6%
SDF–DEN	Louisville to Denver	62	90.3%	2.1 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), March 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Mar 2025	Minutes
Air carrier	22.5%	33.0%	4,671
Late-arriving aircraft	40.9%	39.2%	8,482
National Aviation System	30.1%	21.9%	6,236
Extreme weather	6.1%	5.9%	1,257
Security	0.4%	0.1%	87

20,733 delay minutes on 292 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left SDF on time in March 2025?

84.8% of 1,905 scheduled domestic departures left less than 15 minutes late, and 83.5% reached their destination on time. The national figures that month were 79.9% and 79.3%.

How does that compare with a year earlier?

In March 2024, 84.0% of 2,025 departures left on time and 0.4% were cancelled, against 84.8% and 1.2% in March 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for March 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SDF · methodology · corrections.