Airport month record

HNLAUG

Daniel K. Inouye International in August 2025

Departures: 4,921
Month: August 2025
National, same month: 77.4%
Carriers: 6

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

HNL in August earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.4%. When something does go wrong the average delay runs about an hour. That rests on 4,921 flights, of which Southwest Airlines flew 1,024 at 95.6% on time.

Southwest Airlines is the most reliable of the three carriers covered here at 95.6% on time across 1,024 flights.

On time

88.7%

Arrivals under 15 minutes late, of 4,908 completed departures

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

0.22%

Nationally in August: 1.08%

Whole year

82.9%

HNL across all twelve months

These figures cover 4,921 departures from Daniel K. Inouye International in August 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

August next to HNL's other months

Against HNL's own year, August ran 6 points better than the twelve-month rate of 82.9%, which makes it number two of twelve months, best first. Cancellations were unusually low for HNL in August, at 0.22% against 0.96% across the year. Either side of it, July ran 83.9% on time and September 91.4%, so this month sits in line with its neighbours.

HNL month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	5,176	83.9%	56 min	1.22%	B
August 2025 (this page)	4,921	88.7%	55 min	0.22%	A+
September 2025	4,480	91.4%	61 min	0.25%	A+
October 2025	4,682	87.4%	58 min	0.53%	A+
November 2025	4,623	84.2%	50 min	1.64%	B
December 2025	5,054	76.1%	58 min	0.67%	B+
January 2026	5,054	79.7%	59 min	1.37%	B
February 2026	4,464	81.8%	55 min	0.90%	B+
March 2026	5,037	73.7%	56 min	2.24%	C
April 2026	4,809	82.8%	47 min	0.60%	B+
May 2026	4,953	82.7%	47 min	1.13%	B
June 2026	4,899	83.7%	44 min	0.69%	B+

Departure window

The best time of day to leave HNL in August

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am528 flights94.7%
8am–11am781 flights91.8%
11am–2pm1,141 flights86.0%
2pm–5pm882 flights81.1%
5pm–8pm653 flights93.6%
8pm–5am936 flights89.5%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 94.7% of the time, against 81.1% for the afternoon window. That is 14 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 1,141 flights scheduled in it.

Across the week, Wednesday is the strongest day at 92.8% on time and Thursday the weakest at 85.1%. 8 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at HNL in August

The choice of carrier is not cosmetic here. Southwest Airlines arrives on time 95.6% of the time; United Airlines manages 83.2%. Sample sizes sit next to every figure, because a two-point gap across 426 flights means less than a ten-point one.

Carriers at HNL in August 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Hawaiian Airlines	2,846	87.5%	46 min	0.14%	A+
Southwest Airlines	1,024	95.6%	38 min	0.29%	A+
United Airlines	426	83.2%	86 min	0.47%	B+
Delta Air Linesthin sample	310	89.9%	85 min	0.65%	A+
American Airlinesthin sample	191	90.1%	128 min	0.00%	A+
Alaska Airlinesthin sample	124	70.2%	47 min	0.00%	C+

The spread between Southwest and United is 12 points, wide enough that it should decide the booking. On a hundred trips that is 12 more arrivals inside the on-time window.

Route by route

Busiest routes out of HNL in August

Routes from HNL in August 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
HNL to OGG · Kahului	901	91.9%	35 min	0.22%	A+
HNL to LIH · Lihue	682	93.2%	34 min	0.44%	A+
HNL to KOA · Kailua-Kona	625	92.2%	35 min	0.00%	A+
HNL to ITO · Hilo	534	93.4%	33 min	0.00%	A+
HNL to LAX · Los Angeles	460	84.1%	98 min	0.22%	B+
HNL to SEA · Seattlethin sample	248	74.9%	58 min	0.40%	C+
HNL to SFO · San Franciscothin sample	202	79.5%	70 min	0.50%	B+
HNL to LAS · Las Vegasthin sample	171	90.0%	49 min	0.58%	A+
HNL to SAN · San Diegothin sample	147	86.4%	50 min	0.00%	A+
HNL to PHX · Phoenixthin sample	124	92.7%	163 min	0.00%	A+
HNL to PDX · Portlandthin sample	84	76.2%	86 min	0.00%	B+
HNL to SJC · San Josethin sample	66	92.4%	35 min	0.00%	A+
HNL to LGB · Long Beachthin sample	62	85.5%	29 min	0.00%	A+
HNL to SMF · Sacramentothin sample	62	90.3%	51 min	0.00%	A+
HNL to SLC · Salt Lake Citythin sample	62	82.3%	62 min	0.00%	B+
HNL to JFK · New Yorkthin sample	62	90.3%	45 min	0.00%	A+
HNL to OAK · Oaklandthin sample	62	88.7%	28 min	0.00%	A+
HNL to DEN · Denverthin sample	51	76.0%	75 min	1.96%	B
HNL to DFW · Dallas-Fort Worththin sample	31	83.9%	25 min	0.00%	B+
HNL to ATL · Atlantathin sample	31	90.3%	56 min	0.00%	A+
HNL to DTW · Detroitthin sample	31	83.3%	20 min	3.23%	B−
HNL to MSP · Minneapolisthin sample	31	83.3%	59 min	0.00%	B+
HNL to IAH · Houstonthin sample	31	80.6%	49 min	0.00%	B+
HNL to GUM · Hagatnathin sample	31	74.2%	37 min	0.00%	C+
HNL to ONT · Ontariothin sample	31	87.1%	86 min	0.00%	A+

Delay causes

What held HNL up in August

One category carries most of the weight here. Carrier accounts for 67% of the 31,000 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.

Carrier
67%
Late-arriving aircraft
28%
National Airspace System
4%
Security
1%
Extreme weather
0%

The largest share of delay minutes, 67%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 21,000 of the 31,000 delay minutes reported here. The split is drawn from 30,697 reported delay minutes.

Cancellations are rare at 0.22%, below the national 1.08% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Badly late arrivals are rare here: only 2.4% land an hour or more behind schedule, against 8.2% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

What to do with this

Flying from HNL in August

For a August trip through HNL: this is one of the better months to be flying from here, 88.7% on time with 0.22% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.

Daniel K. Inouye International (HNL), the whole year
HNL in July83.9%
HNL in September91.4%
HNL in October87.4%
HNL in November84.2%
HNL in December76.1%
HNL in January79.7%
HNL in February81.8%
HNL in March73.7%
HNL in April82.8%
HNL in May82.7%
HNL in June83.7%

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