Harry Reid International in December 2024

79.9%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 2024, reporting carriers scheduled 15,581 domestic departures from Harry Reid International (LAS). 79.9% left less than 15 minutes late and 82.5% reached their destination on time; 0.4% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so LAS departures were 2.1 points above the national departure figure.

A year earlier, in December 2023, the airport had 15,872 departures with 81.6% leaving on time: a change of −1.7 points, with flights down 2%.

Flights arriving at LAS that month were on time 82.0% of the time (15,576 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, air carrier 34% and national aviation system 21%.

On time 82.5%
Arrived 15+ minutes late 16.8%
Cancelled 0.4%
Diverted 0.3%

Every scheduled departure from LAS in December 2024, judged by arrival at the destination.

December 2024 against a year earlier, the airport's year and the nation

Measure	Dec 2024	Dec 2023	LAS, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	79.9%	81.6%	73.8%	77.8%
Arrived on time	82.5%	83.0%	76.8%	78.1%
Cancelled	0.4%	0.2%	0.9%	0.7%
Average departure delay (late minutes only)	13.0 min	10.9 min	16.3 min	16.6 min
Scheduled departures a day	519	529	474	19,686
Scheduled departures	15,581	15,872	172,932	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	7,117	46%	81.3%	2.1 min	0.4%
NK Spirit Airlines	1,758	11%	84.8%	-0.8 min	0.2%
DL Delta Air Lines	1,383	9%	89.6%	-5.2 min	0.0%
UA United Airlines	1,264	8%	86.2%	-1.2 min	0.3%
AA American Airlines	1,209	8%	84.3%	2.4 min	0.9%
F9 Frontier Airlines	1,008	6%	85.5%	-1.3 min	0.0%
G4 Allegiant Air	702	5%	81.8%	4.5 min	0.9%
AS Alaska Airlines	459	3%	73.9%	10.1 min	0.4%
OO SkyWest Airlines	312	2%	58.3%	28.7 min	2.6%
B6 JetBlue Airways	245	2%	78.0%	3.5 min	0.8%
HA Hawaiian Airlines	124	1%	71.0%	18.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
LAS–LAX	Las Vegas to Los Angeles	805	85.2%	-0.4 min	0.0%
LAS–DEN	Las Vegas to Denver	618	90.8%	-3.8 min	0.0%
LAS–SAN	Las Vegas to San Diego	587	64.2%	19.4 min	3.2%
LAS–PHX	Las Vegas to Phoenix	554	87.5%	-0.5 min	0.7%
LAS–SFO	Las Vegas to San Francisco	534	69.5%	14.2 min	0.4%
LAS–SEA	Las Vegas to Seattle	494	82.4%	-0.9 min	0.4%
LAS–DFW	Las Vegas to Dallas/Fort Worth	489	82.0%	6.9 min	1.6%
LAS–SMF	Las Vegas to Sacramento	432	84.5%	-1.7 min	0.0%
LAS–ATL	Las Vegas to Atlanta	424	90.6%	-6.5 min	0.0%
LAS–SJC	Las Vegas to San Jose	420	85.5%	-1.5 min	0.2%
LAS–ORD	Las Vegas to Chicago	399	87.0%	-4.2 min	0.5%
LAS–OAK	Las Vegas to Oakland	384	80.5%	3.9 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), December 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	33.5%	34.3%	54,536
Late-arriving aircraft	41.1%	40.2%	66,926
National Aviation System	20.5%	17.8%	33,320
Extreme weather	4.6%	7.5%	7,557
Security	0.3%	0.2%	459

162,798 delay minutes on 2,612 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 LAS on time in December 2024?

79.9% of 15,581 scheduled domestic departures left less than 15 minutes late, and 82.5% reached their destination on time. The national figures that month were 77.8% and 78.1%.

How does that compare with a year earlier?

In December 2023, 81.6% of 15,872 departures left on time and 0.2% were cancelled, against 79.9% and 0.4% in December 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2024; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for LAS · methodology · corrections.