Louis Armstrong New Orleans International in December 2025

74.3%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 December 2025, reporting carriers scheduled 4,152 domestic departures from Louis Armstrong New Orleans International (MSY). 74.3% left less than 15 minutes late and 76.9% reached their destination on time; 1.3% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so MSY departures were 2.3 points above the national departure figure.

A year earlier, in December 2024, the airport had 4,205 departures with 78.0% leaving on time: a change of −3.7 points, with flights down 1%.

Flights arriving at MSY that month were on time 72.6% of the time (4,156 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, air carrier 31% and national aviation system 15%.

On time 76.9%
Arrived 15+ minutes late 21.7%
Cancelled 1.3%
Diverted 0.1%

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

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

Measure	Dec 2025	Dec 2024	MSY, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	74.3%	78.0%	76.0%	72.0%
Arrived on time	76.9%	79.2%	76.9%	71.9%
Cancelled	1.3%	0.5%	1.5%	1.5%
Average departure delay (late minutes only)	18.9 min	15.9 min	17.3 min	21.2 min
Scheduled departures a day	138	140	135	19,410
Scheduled departures	4,152	4,205	49,152	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,586	38%	78.0%	6.0 min	0.4%
DL Delta Air Lines	651	16%	78.0%	8.7 min	4.1%
AA American Airlines	615	15%	74.3%	13.7 min	0.3%
UA United Airlines	535	13%	85.8%	0.1 min	0.2%
NK Spirit Airlines	188	5%	80.9%	2.7 min	2.1%
B6 JetBlue Airways	145	3%	59.3%	28.6 min	2.8%
YX Republic Airline	117	3%	72.6%	14.1 min	0.9%
OH PSA Airlines	116	3%	62.1%	22.5 min	4.3%
F9 Frontier Airlines	59	1%	66.1%	38.9 min	3.4%
AS Alaska Airlines	54	1%	66.7%	13.6 min	0.0%
MQ Envoy Air	38	1%	76.3%	10.3 min	0.0%
OO SkyWest Airlines	31	1%	77.4%	7.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MSY–ATL	New Orleans to Atlanta	354	77.7%	6.5 min	2.8%
MSY–IAH	New Orleans to Houston	224	86.2%	0.9 min	0.0%
MSY–DFW	New Orleans to Dallas/Fort Worth	201	74.6%	8.3 min	0.0%
MSY–HOU	New Orleans to Houston	192	80.7%	-0.1 min	1.0%
MSY–DAL	New Orleans to Dallas	191	80.6%	5.0 min	0.5%
MSY–DEN	New Orleans to Denver	191	79.1%	10.9 min	0.5%
MSY–MCO	New Orleans to Orlando	185	77.3%	7.4 min	1.6%
MSY–ORD	New Orleans to Chicago	185	76.2%	23.5 min	0.0%
MSY–DCA	New Orleans to Washington	176	73.3%	12.1 min	1.1%
MSY–AUS	New Orleans to Austin	163	73.6%	7.1 min	0.0%
MSY–CLT	New Orleans to Charlotte	147	77.6%	4.4 min	0.7%
MSY–LAX	New Orleans to Los Angeles	145	77.9%	7.6 min	0.7%

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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	30.9%	33.3%	20,618
Late-arriving aircraft	51.1%	41.1%	34,054
National Aviation System	15.3%	19.1%	10,228
Extreme weather	2.5%	6.4%	1,697
Security	0.1%	0.2%	97

66,694 delay minutes on 900 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 December 2025?

74.3% of 4,152 scheduled domestic departures left less than 15 minutes late, and 76.9% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 78.0% of 4,205 departures left on time and 0.5% were cancelled, against 74.3% and 1.3% in December 2025.

Provenance

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