Harry Reid International in January 2026

78.5%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 January 2026, reporting carriers scheduled 13,695 domestic departures from Harry Reid International (LAS). 78.5% left less than 15 minutes late and 81.4% reached their destination on time; 1.9% were cancelled.

Nationally that month, 75.6% of flights departed on time and 75.3% arrived on time, so LAS departures were 2.9 points above the national departure figure.

A year earlier, in January 2025, the airport had 15,007 departures with 80.6% leaving on time: a change of −2.1 points, with flights down 9%.

Flights arriving at LAS that month were on time 80.1% of the time (13,709 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 37% and national aviation system 16%.

On time 81.4%
Arrived 15+ minutes late 16.6%
Cancelled 1.9%
Diverted 0.1%

Every scheduled departure from LAS in January 2026, judged by arrival at the destination.

January 2026 against a year earlier, the airport's year and the nation

Measure	Jan 2026	Jan 2025	LAS, 12 months to Jul 2026	All reported flights, Jan 2026
Departed on time	78.5%	80.6%	73.8%	75.6%
Arrived on time	81.4%	83.9%	76.8%	75.3%
Cancelled	1.9%	1.1%	0.9%	4.7%
Average departure delay (late minutes only)	13.6 min	12.1 min	16.3 min	16.7 min
Scheduled departures a day	457	500	474	18,133
Scheduled departures	13,695	15,007	172,932	544,003

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	6,704	49%	81.5%	1.2 min	1.1%
DL Delta Air Lines	1,366	10%	84.0%	1.3 min	1.8%
UA United Airlines	1,295	9%	85.3%	-2.0 min	1.1%
AA American Airlines	1,063	8%	72.2%	17.9 min	7.5%
F9 Frontier Airlines	932	7%	79.0%	2.1 min	1.8%
AS Alaska Airlines	674	5%	82.3%	-1.3 min	1.3%
G4 Allegiant Air	534	4%	84.6%	0.2 min	1.5%
NK Spirit Airlines	494	4%	85.8%	-4.4 min	2.4%
B6 JetBlue Airways	352	3%	78.7%	3.2 min	3.7%
OO SkyWest Airlines	281	2%	80.1%	2.7 min	0.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
LAS–LAX	Las Vegas to Los Angeles	740	79.1%	3.5 min	0.8%
LAS–DEN	Las Vegas to Denver	561	85.4%	-0.6 min	0.4%
LAS–SFO	Las Vegas to San Francisco	521	77.7%	6.4 min	0.8%
LAS–PHX	Las Vegas to Phoenix	512	80.9%	2.9 min	1.2%
LAS–SEA	Las Vegas to Seattle	459	86.5%	-5.3 min	0.4%
LAS–DFW	Las Vegas to Dallas/Fort Worth	424	70.0%	18.6 min	9.2%
LAS–SAN	Las Vegas to San Diego	406	70.4%	12.5 min	1.0%
LAS–ATL	Las Vegas to Atlanta	384	83.9%	-0.4 min	2.9%
LAS–SNA	Las Vegas to Santa Ana	358	88.8%	-4.3 min	0.3%
LAS–ORD	Las Vegas to Chicago	356	77.8%	9.8 min	0.6%
LAS–BUR	Las Vegas to Burbank	340	83.2%	-2.2 min	0.3%
LAS–RNO	Las Vegas to Reno	321	86.6%	-2.7 min	0.6%

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), January 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2026	Minutes
Air carrier	37.0%	37.3%	54,647
Late-arriving aircraft	43.7%	35.0%	64,636
National Aviation System	15.5%	18.0%	22,891
Extreme weather	3.7%	9.6%	5,468
Security	0.1%	0.1%	132

147,774 delay minutes on 2,273 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 January 2026?

78.5% of 13,695 scheduled domestic departures left less than 15 minutes late, and 81.4% reached their destination on time. The national figures that month were 75.6% and 75.3%.

How does that compare with a year earlier?

In January 2025, 80.6% of 15,007 departures left on time and 1.1% were cancelled, against 78.5% and 1.9% in January 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for January 2026; 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.