Louis Armstrong New Orleans International in May 2025

73.7%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 May 2025, reporting carriers scheduled 4,483 domestic departures from Louis Armstrong New Orleans International (MSY). 73.7% left less than 15 minutes late and 75.2% reached their destination on time; 1.0% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so MSY departures were 3.0 points below the national departure figure.

A year earlier, in May 2024, the airport had 4,518 departures with 69.0% leaving on time: a change of +4.7 points, with flights down 1%.

Flights arriving at MSY that month were on time 73.8% of the time (4,484 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 28% and national aviation system 27%.

On time 75.2%
Arrived 15+ minutes late 23.7%
Cancelled 1.0%
Diverted 0.2%

Every scheduled departure from MSY in May 2025, judged by arrival at the destination.

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

Measure	May 2025	May 2024	MSY, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	73.7%	69.0%	76.0%	76.7%
Arrived on time	75.2%	68.1%	76.9%	75.4%
Cancelled	1.0%	1.6%	1.5%	1.0%
Average departure delay (late minutes only)	20.6 min	25.5 min	17.3 min	17.5 min
Scheduled departures a day	149	151	135	20,188
Scheduled departures	4,483	4,518	49,152	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,587	35%	77.1%	9.8 min	0.6%
AA American Airlines	748	17%	73.9%	19.3 min	1.6%
DL Delta Air Lines	689	15%	77.2%	9.7 min	0.1%
UA United Airlines	587	13%	74.3%	10.9 min	1.2%
NK Spirit Airlines	432	10%	71.5%	14.6 min	1.6%
B6 JetBlue Airways	104	2%	70.2%	25.0 min	0.0%
AS Alaska Airlines	76	2%	71.1%	16.3 min	0.0%
OH PSA Airlines	70	2%	82.9%	-2.9 min	2.9%
MQ Envoy Air	68	2%	66.2%	9.5 min	7.4%
OO SkyWest Airlines	62	1%	74.2%	9.8 min	0.0%
F9 Frontier Airlines	47	1%	61.7%	35.8 min	0.0%
YX Republic Airline	11	0%	100.0%	-8.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSY–ATL	New Orleans to Atlanta	383	79.1%	6.2 min	0.0%
MSY–IAH	New Orleans to Houston	264	78.0%	7.0 min	1.5%
MSY–DFW	New Orleans to Dallas/Fort Worth	257	65.8%	27.9 min	4.3%
MSY–MCO	New Orleans to Orlando	210	75.2%	15.4 min	0.0%
MSY–HOU	New Orleans to Houston	205	77.6%	6.9 min	0.0%
MSY–DAL	New Orleans to Dallas	201	75.6%	14.1 min	2.5%
MSY–CLT	New Orleans to Charlotte	198	76.8%	9.1 min	2.0%
MSY–DEN	New Orleans to Denver	180	72.8%	13.6 min	0.0%
MSY–AUS	New Orleans to Austin	179	67.0%	15.1 min	1.7%
MSY–ORD	New Orleans to Chicago	170	88.2%	-3.9 min	0.0%
MSY–MIA	New Orleans to Miami	160	77.5%	12.4 min	1.3%
MSY–DCA	New Orleans to Washington	154	74.0%	5.7 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	28.4%	29.3%	23,790
Late-arriving aircraft	39.1%	37.8%	32,767
National Aviation System	26.8%	25.9%	22,437
Extreme weather	5.6%	6.9%	4,651
Security	0.2%	0.1%	134

83,779 delay minutes on 1,062 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 MSY on time in May 2025?

73.7% of 4,483 scheduled domestic departures left less than 15 minutes late, and 75.2% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 69.0% of 4,518 departures left on time and 1.6% were cancelled, against 73.7% and 1.0% in May 2025.

Provenance

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