Airport month record

OAKAUG

Oakland International in August 2025

Departures: 2,850
Month: August 2025
National, same month: 77.4%
Carriers: 5

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

OAK in August lands a B+, 4 points better than the national rate of 77.4%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 2,850 flights, with a median arrival 5 minutes early.

Set against the rest of the country, OAK's August record is 4 points better than the US average of 77.4%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.

On time

81.4%

Arrivals under 15 minutes late, of 2,832 completed departures

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

0.35%

Nationally in August: 1.08%

Whole year

79.5%

OAK across all twelve months

These figures cover 2,850 departures from Oakland 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 OAK's other months

Against OAK's own year, August ran 2 points better than the twelve-month rate of 79.5%, which makes it number five of twelve months, best first. Cancellations were unusually low for OAK in August, at 0.35% against 0.64% across the year. Either side of it, July ran 78.4% on time and September 82.4%, so this month sits in line with its neighbours.

OAK month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	3,046	78.4%	62 min	1.05%	B
August 2025 (this page)	2,850	81.4%	58 min	0.35%	B+
September 2025	2,714	82.4%	47 min	0.29%	B+
October 2025	2,771	79.6%	52 min	0.25%	B+
November 2025	2,618	81.6%	56 min	2.06%	B
December 2025	2,646	76.7%	50 min	0.57%	B+
January 2026	2,408	88.4%	54 min	0.46%	A+
February 2026	2,356	83.7%	50 min	0.25%	B+
March 2026	2,569	80.1%	53 min	0.97%	B+
April 2026	2,509	76.4%	46 min	0.28%	B+
May 2026	2,683	76.1%	50 min	0.63%	B+
June 2026	2,597	69.7%	49 min	0.42%	C+

Departure window

The best time of day to leave OAK in August

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am532 flights92.8%
8am–11am559 flights89.0%
11am–2pm579 flights80.2%
2pm–5pm419 flights76.0%
5pm–8pm464 flights69.2%
8pm–5am297 flights75.3%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 92.8% of the time, against 69.2% for the evening window. That is 24 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 579 flights scheduled in it.

Across the week, Wednesday is the strongest day at 88.3% on time and Friday the weakest at 75.2%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at OAK in August

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

Carriers at OAK in August 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,483	81.5%	46 min	0.20%	B+
SkyWest Airlinesthin sample	112	86.6%	66 min	0.00%	A+
Hawaiian Airlinesthin sample	87	90.4%	340 min	4.60%	A−
Spirit Airlinesthin sample	83	81.9%	98 min	0.00%	B+
Alaska Airlinesthin sample	56	61.8%	90 min	1.79%	D

Route by route

Busiest routes out of OAK in August

Routes from OAK in August 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
OAK to LAS · Las Vegasthin sample	326	83.0%	51 min	0.00%	B+
OAK to SAN · San Diegothin sample	282	71.6%	47 min	0.00%	C+
OAK to BUR · Burbankthin sample	257	84.7%	45 min	0.39%	B+
OAK to SNA · Santa Anathin sample	206	85.4%	39 min	0.00%	A+
OAK to SEA · Seattlethin sample	199	70.7%	61 min	0.50%	C+
OAK to LAX · Los Angelesthin sample	185	79.0%	48 min	2.16%	B
OAK to SLC · Salt Lake Citythin sample	150	92.0%	65 min	0.00%	A+
OAK to LGB · Long Beachthin sample	148	84.5%	50 min	0.00%	B+
OAK to PHX · Phoenixthin sample	143	81.1%	59 min	0.00%	B+
OAK to DEN · Denverthin sample	141	72.1%	42 min	0.00%	C+
OAK to ONT · Ontariothin sample	135	87.4%	46 min	0.00%	A+
OAK to PDX · Portlandthin sample	104	82.7%	50 min	0.00%	B+
OAK to HNL · Honoluluthin sample	62	90.0%	310 min	3.23%	A−
OAK to LIH · Lihuethin sample	62	90.3%	240 min	0.00%	A+
OAK to OGG · Kahuluithin sample	56	90.6%	72 min	3.57%	A−
OAK to BOI · Boisethin sample	52	90.4%	33 min	0.00%	A+
OAK to GEG · Spokanethin sample	44	81.8%	37 min	0.00%	B+
OAK to DAL · Dallasthin sample	38	73.7%	69 min	0.00%	C+
OAK to MDW · Chicagothin sample	36	85.7%	34 min	0.00%	A+
OAK to MCI · Kansas Citythin sample	34	85.3%	53 min	0.00%	A+
OAK to HOU · Houstonthin sample	31	73.3%	24 min	0.00%	C+
OAK to EUG · Eugenethin sample	31	80.6%	54 min	0.00%	B+
OAK to ABQ · Albuquerquethin sample	30	86.7%	25 min	0.00%	A+
OAK to AUS · Austinthin sample	30	73.3%	43 min	0.00%	C+

Delay causes

What held OAK up in August

One category carries most of the weight here. Carrier accounts for 47% 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
47%
Late-arriving aircraft
39%
National Airspace System
14%
Extreme weather
0%
Security
0%

39% 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 31,000 reported delay minutes here, that single category outweighs weather by 39 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 30,760 reported delay minutes.

Cancellations are rare at 0.35%, 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 4.6% 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 OAK in August

For a August trip through OAK: expect 81.4% on time and 0.35% cancelled, going by August 2025. The 5am–8am window was the strongest part of the day.

Oakland International (OAK), the whole year
OAK in July78.4%
OAK in September82.4%
OAK in October79.6%
OAK in November81.6%
OAK in December76.7%
OAK in January88.4%
OAK in February83.7%
OAK in March80.1%
OAK in April76.4%
OAK in May76.1%
OAK in June69.7%

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