Airport month record

LASJUL

Harry Reid International in July 2026

Departures: 14,315
Month: July 2026
National, same month: 71.7%
Carriers: 9

Historical statistics for July 2026, 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 worse than the national rate of 71.7%. The late ones land about an hour behind schedule. That rests on 14,315 flights, of which Allegiant Air flew 636 at 83.1% on time.

Allegiant Air is the most reliable of the seven carriers covered here at 83.1% on time across 636 flights.

On time

69.6%

Arrivals under 15 minutes late, of 14,081 completed departures

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

1.01%

Nationally in July: 2.62%

Whole year

76.9%

LAS across all twelve months

These figures cover 14,315 departures from Harry Reid International in July 2026. 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 7 points worse than the twelve-month rate of 76.9%, which makes it number eleven of twelve months, best first. Either side of it, June ran 70.7% on time and August 69.6%, so this month sits in line with its neighbours.

LAS month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
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+
July 2026 (this page)	14,315	69.6%	63 min	1.01%	C
August 2026	13,832	69.6%	72 min	0.95%	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 28 points, against 21 points between the best and worst carrier.

5am–8am2,386 flights86.2%
8am–11am2,627 flights80.7%
11am–2pm2,424 flights67.5%
2pm–5pm2,215 flights61.0%
5pm–8pm1,927 flights57.9%
8pm–5am2,736 flights61.4%

Scale runs 50% to 90%.

The 5pm–8pm window is where this operation falls apart: 57.9% on time, against 86.2% 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 8pm–5am window is the busiest, with 2,736 flights scheduled in it.

Across the week, Saturday is the strongest day at 77.4% on time and Friday the weakest at 64.0%, a spread of 13 points.

Carrier by carrier

Which airlines ran best at LAS in July

The choice of carrier is not cosmetic here. Allegiant Air arrives on time 83.1% of the time; Frontier Airlines manages 62.5%. Sample sizes sit next to every figure, because a two-point gap across 1,417 flights means less than a ten-point one.

Carriers at LAS in July 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	7,518	67.9%	47 min	0.44%	C+
Frontier Airlines	1,417	62.5%	88 min	2.54%	D
Delta Air Lines	1,245	75.2%	70 min	1.69%	B
United Airlines	1,207	71.5%	80 min	1.16%	C
American Airlines	1,205	69.6%	107 min	1.49%	C
Allegiant Air	636	83.1%	76 min	0.00%	B+
Alaska Airlines	635	74.4%	56 min	0.94%	C+
JetBlue Airwaysthin sample	295	67.9%	113 min	5.76%	C−
SkyWest Airlinesthin sample	157	82.2%	52 min	0.00%	B+

The spread between Allegiant and Frontier is 21 points, wide enough that it should decide the booking. On a hundred trips that is 21 more arrivals inside the on-time window.

Route by route

Busiest routes out of LAS in July

Routes from LAS in July 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
LAS to LAX · Los Angeles	666	73.3%	68 min	0.60%	C+
LAS to DEN · Denver	574	65.0%	68 min	0.35%	C+
LAS to SFO · San Francisco	549	39.9%	60 min	1.46%	F
LAS to SEA · Seattle	491	82.1%	69 min	0.81%	B+
LAS to PHX · Phoenix	488	71.2%	72 min	1.23%	C
LAS to ORD · Chicago	419	73.0%	132 min	2.39%	C
LAS to RNO · Reno	411	74.0%	56 min	0.97%	C+
LAS to DFW · Dallas-Fort Worth	401	70.1%	104 min	1.00%	C
LAS to SAN · San Diego	400	51.6%	50 min	0.75%	F+
LAS to ATL · Atlanta	396	68.4%	66 min	1.01%	C
LAS to SMF · Sacramentothin sample	336	75.7%	54 min	0.60%	B+
LAS to JFK · New Yorkthin sample	321	68.9%	90 min	7.48%	C−
LAS to BUR · Burbankthin sample	319	74.1%	61 min	1.57%	C
LAS to SJC · San Josethin sample	315	77.1%	49 min	0.32%	B+
LAS to SNA · Santa Anathin sample	313	78.2%	47 min	0.32%	B+
LAS to SLC · Salt Lake Citythin sample	302	76.0%	60 min	0.66%	B+
LAS to OAK · Oaklandthin sample	288	77.7%	43 min	0.35%	B+
LAS to PDX · Portlandthin sample	276	77.7%	58 min	0.72%	B+
LAS to IAH · Houstonthin sample	264	80.2%	81 min	1.89%	B
LAS to AUS · Austinthin sample	257	66.3%	58 min	0.78%	C+
LAS to DAL · Dallasthin sample	237	63.4%	48 min	0.00%	D+
LAS to ONT · Ontariothin sample	212	73.0%	59 min	0.47%	C+
LAS to MDW · Chicagothin sample	209	68.3%	52 min	0.00%	C+
LAS to DTW · Detroitthin sample	199	67.3%	50 min	0.50%	C+
LAS to MCO · Orlandothin sample	197	57.2%	82 min	1.02%	D

Delay causes

What held LAS up in July

Late-arriving aircraft accounts for 44% of the 271,000 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
44%
Carrier
37%
National Airspace System
18%
Extreme weather
1%
Security
0%

44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 271,000 reported delay minutes here, that single category outweighs weather by 30 to one. The split is drawn from 270,756 reported delay minutes.

Cancellations sit at 1.01% against a national 2.62%, which is ordinary. Diversions add another 0.62%.

9.3% of arrivals land a full hour or more behind schedule, against 11.3% nationally. Ninety minutes is the honest minimum for a connection 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 86.2% on time, and with 9.3% 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 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%
LAS in August69.6%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures