Airport month record

LASJUL

Harry Reid International in July 2025

Departures: 15,733
Month: July 2025
National, same month: 71.1%
Carriers: 11

Historical statistics for July 2025, not live status or a forecast for this year’s July. For today’s conditions at LAS, see live FAA status.

LAS in July sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 2 points better than the national rate of 71.1%. The late ones land about an hour behind schedule. That rests on 15,733 flights, of which Allegiant Air flew 696 at 80.5% on time.

Allegiant Air is the most reliable of the nine carriers covered here at 80.5% on time across 696 flights.

On time

72.9%

Arrivals under 15 minutes late, of 15,471 completed departures

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

1.13%

Nationally in July: 2.45%

Whole year

77.9%

LAS across all twelve months

These figures cover 15,733 departures from Harry Reid International in July 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

July next to LAS's other months

Against LAS's own year, July ran 5 points worse than the twelve-month rate of 77.9%, which makes it number eleven of twelve months, best first.

LAS month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025 (this page)	15,733	72.9%	67 min	1.13%	C
August 2025	14,920	79.6%	59 min	0.50%	B+
September 2025	14,399	78.8%	66 min	0.53%	B+
October 2025	15,597	77.1%	62 min	0.31%	B+
November 2025	14,443	79.5%	59 min	1.73%	B
December 2025	14,547	79.9%	59 min	0.60%	B+
January 2026	13,695	83.1%	65 min	1.86%	B
February 2026	12,886	83.1%	58 min	0.88%	B+
March 2026	15,169	78.3%	60 min	1.15%	B
April 2026	14,672	78.8%	54 min	0.40%	B+
May 2026	14,585	74.1%	60 min	0.67%	C+
June 2026	13,704	70.7%	61 min	0.77%	C+

Departure window

The best time of day to leave LAS in July

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 31 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am2,454 flights92.1%
8am–11am3,403 flights78.6%
11am–2pm2,410 flights74.0%
2pm–5pm2,254 flights65.7%
5pm–8pm2,283 flights60.6%
8pm–5am2,929 flights64.5%

Scale runs 50% to 100%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 60.6% on time, against 92.1% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8am–11am window is the busiest, with 3,403 flights scheduled in it.

Across the week, Saturday is the strongest day at 83.7% on time and Thursday the weakest at 64.0%. 20 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at LAS in July

The choice of carrier is not cosmetic here. Allegiant Air arrives on time 80.5% of the time; Southwest Airlines manages 69.4%. Sample sizes sit next to every figure, because a two-point gap across 7,466 flights means less than a ten-point one.

Carriers at LAS in July 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	7,466	69.4%	59 min	0.72%	C+
Spirit Airlines	1,476	78.6%	60 min	1.08%	B
Delta Air Lines	1,343	80.2%	75 min	0.74%	B+
United Airlines	1,242	75.1%	72 min	1.29%	B
American Airlines	1,195	73.5%	99 min	2.76%	C
Frontier Airlines	997	69.7%	84 min	2.11%	C
Allegiant Air	696	80.5%	66 min	0.29%	B+
SkyWest Airlines	476	79.4%	95 min	1.05%	B
Alaska Airlines	468	76.7%	60 min	1.92%	B
JetBlue Airwaysthin sample	244	71.8%	81 min	4.10%	C−
Hawaiian Airlinesthin sample	126	62.1%	48 min	1.59%	D

Allegiant leads Southwest by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Route by route

Busiest routes out of LAS in July

Routes from LAS in July 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
LAS to LAX · Los Angeles	742	74.0%	65 min	0.40%	C+
LAS to SAN · San Diego	646	70.8%	63 min	2.01%	C
LAS to DEN · Denver	560	63.9%	80 min	1.61%	D
LAS to SEA · Seattle	521	80.8%	59 min	0.96%	B+
LAS to PHX · Phoenix	495	74.3%	75 min	0.81%	C+
LAS to SFO · San Francisco	494	65.0%	56 min	1.21%	C
LAS to ORD · Chicago	479	71.0%	65 min	1.67%	C
LAS to SMF · Sacramento	452	73.5%	77 min	1.33%	C
LAS to DFW · Dallas-Fort Worth	435	68.8%	112 min	3.68%	C−
LAS to ATL · Atlanta	416	76.9%	72 min	1.20%	B
LAS to SNA · Santa Ana	415	80.0%	73 min	1.20%	B
LAS to SJC · San Jose	380	74.9%	80 min	1.32%	C
LAS to BUR · Burbank	373	79.8%	64 min	1.61%	B
LAS to OAK · Oaklandthin sample	349	65.7%	56 min	0.57%	C+
LAS to RNO · Renothin sample	329	76.1%	61 min	0.91%	B+
LAS to JFK · New Yorkthin sample	322	64.1%	96 min	4.35%	D−
LAS to PDX · Portlandthin sample	304	76.2%	70 min	0.66%	B+
LAS to SLC · Salt Lake Citythin sample	299	77.2%	67 min	0.33%	B+
LAS to IAH · Houstonthin sample	287	78.4%	62 min	2.09%	B
LAS to EWR · Newarkthin sample	260	72.1%	77 min	2.31%	C
LAS to MDW · Chicagothin sample	255	72.5%	76 min	1.57%	C
LAS to DAL · Dallasthin sample	255	66.4%	47 min	1.96%	C
LAS to DTW · Detroitthin sample	248	76.8%	79 min	0.40%	B+
LAS to AUS · Austinthin sample	245	62.1%	62 min	0.41%	D+
LAS to CLT · Charlottethin sample	230	80.4%	132 min	1.30%	B

Delay causes

What held LAS up in July

One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 281,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
43%
Carrier
35%
National Airspace System
19%
Extreme weather
3%
Security
0%

43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 281,000 reported delay minutes here, that single category outweighs weather by 13 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 281,140 reported delay minutes.

Cancellations sit at 1.13% against a national 2.45%, which is ordinary. Diversions add another 0.53%.

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.4% of arrivals land a full hour or more behind schedule, against 12.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

What to do with this

Flying from LAS in July

For a July trip through LAS: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 92.1% on time, and with 9.4% of arrivals an hour or more late, a connection here deserves more slack than the same trip in January would.

Harry Reid International (LAS), the whole year
LAS in August79.6%
LAS in September78.8%
LAS in October77.1%
LAS in November79.5%
LAS in December79.9%
LAS in January83.1%
LAS in February83.1%
LAS in March78.3%
LAS in April78.8%
LAS in May74.1%
LAS in June70.7%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures