Louis Armstrong New Orleans International in August 2025

78.8%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 August 2025, reporting carriers scheduled 3,739 domestic departures from Louis Armstrong New Orleans International (MSY). 78.8% left less than 15 minutes late and 79.0% reached their destination on time; 1.1% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so MSY departures were 2.0 points above the national departure figure.

A year earlier, in August 2024, the airport had 3,768 departures with 76.0% leaving on time: a change of +2.8 points, with flights down 1%.

Flights arriving at MSY that month were on time 76.2% of the time (3,737 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 34% and national aviation system 22%.

On time 79.0%
Arrived 15+ minutes late 19.5%
Cancelled 1.1%
Diverted 0.5%

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

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

Measure	Aug 2025	Aug 2024	MSY, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	78.8%	76.0%	76.0%	76.8%
Arrived on time	79.0%	76.6%	76.9%	76.3%
Cancelled	1.1%	1.8%	1.5%	1.1%
Average departure delay (late minutes only)	17.6 min	18.2 min	17.3 min	17.6 min
Scheduled departures a day	125	126	135	20,079
Scheduled departures	3,739	3,768	49,152	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,331	36%	81.5%	3.4 min	0.6%
DL Delta Air Lines	582	16%	85.2%	-2.1 min	1.2%
UA United Airlines	498	13%	80.1%	4.7 min	0.8%
AA American Airlines	439	12%	69.7%	26.1 min	1.4%
NK Spirit Airlines	364	10%	76.4%	12.3 min	0.8%
MQ Envoy Air	121	3%	71.1%	7.8 min	2.5%
YX Republic Airline	94	3%	93.6%	-12.2 min	2.1%
OH PSA Airlines	88	2%	63.6%	25.4 min	5.7%
OO SkyWest Airlines	75	2%	88.0%	-3.5 min	0.0%
AS Alaska Airlines	57	2%	66.7%	7.5 min	0.0%
B6 JetBlue Airways	54	1%	63.0%	42.2 min	3.7%
F9 Frontier Airlines	36	1%	55.6%	20.4 min	2.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSY–ATL	New Orleans to Atlanta	333	80.8%	3.2 min	1.2%
MSY–IAH	New Orleans to Houston	247	82.2%	2.6 min	0.4%
MSY–DFW	New Orleans to Dallas/Fort Worth	239	63.6%	22.2 min	3.8%
MSY–AUS	New Orleans to Austin	181	84.0%	1.5 min	0.0%
MSY–DAL	New Orleans to Dallas	180	78.9%	7.2 min	0.6%
MSY–HOU	New Orleans to Houston	178	80.3%	2.7 min	0.0%
MSY–ORD	New Orleans to Chicago	157	81.5%	-4.7 min	1.9%
MSY–MCO	New Orleans to Orlando	155	71.6%	10.3 min	0.6%
MSY–DEN	New Orleans to Denver	148	74.3%	4.5 min	0.7%
MSY–DCA	New Orleans to Washington	145	71.7%	8.4 min	2.1%
MSY–MIA	New Orleans to Miami	139	69.8%	26.8 min	0.7%
MSY–CLT	New Orleans to Charlotte	128	81.3%	31.3 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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	33.9%	33.1%	19,701
Late-arriving aircraft	39.0%	40.5%	22,687
National Aviation System	22.2%	19.2%	12,940
Extreme weather	4.8%	7.0%	2,772
Security	0.1%	0.1%	79

58,179 delay minutes on 728 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 August 2025?

78.8% of 3,739 scheduled domestic departures left less than 15 minutes late, and 79.0% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 76.0% of 3,768 departures left on time and 1.8% were cancelled, against 78.8% and 1.1% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 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.