Airport month record

OAKAPR

Oakland International in April 2026

Departures: 2,509
Month: April 2026
National, same month: 79.8%
Carriers: 3

Historical statistics for April 2026, not live status or a forecast for this year’s April. For today’s conditions at OAK, see live FAA status.

OAK in April lands a B+, 3 points worse than the national rate of 79.8%. About one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That is a workable record, not a spotless one. That rests on 2,509 flights, with a median arrival 3 minutes early.

On time

76.4%

Arrivals under 15 minutes late, of 2,500 completed departures

Avg delay

46 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

Nationally in April: 0.90%

Whole year

79.5%

OAK across all twelve months

These figures cover 2,509 departures from Oakland International in April 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

April next to OAK's other months

Against OAK's own year, April ran 3 points worse than the twelve-month rate of 79.5%, which makes it number ten of twelve months, best first. Cancellations were unusually low for OAK in April, at 0.28% against 0.64% across the year. Either side of it, March ran 80.1% on time and May 76.1%, 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	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 (this page)	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 April

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 31 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–8am488 flights94.4%
8am–11am446 flights84.2%
11am–2pm434 flights72.7%
2pm–5pm445 flights68.9%
5pm–8pm396 flights68.4%
8pm–5am300 flights63.0%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 63.0% on time, against 94.4% 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 5am–8am window is the busiest, with 488 flights scheduled in it.

Across the week, Tuesday is the strongest day at 90.2% on time and Friday the weakest at 68.8%. 21 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at OAK in April

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 April 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	2,227	74.9%	46 min	0.27%	C+
Alaska Airlinesthin sample	150	90.6%	45 min	0.67%	A+
SkyWest Airlinesthin sample	124	87.9%	70 min	0.00%	A+

Route by route

Busiest routes out of OAK in April

Routes from OAK in April 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
OAK to LAS · Las Vegasthin sample	272	74.5%	52 min	0.37%	C+
OAK to SAN · San Diegothin sample	261	58.8%	46 min	0.38%	D+
OAK to BUR · Burbankthin sample	213	83.8%	44 min	0.94%	B+
OAK to SNA · Santa Anathin sample	195	85.6%	45 min	0.00%	A+
OAK to PHX · Phoenixthin sample	170	78.2%	55 min	0.00%	B+
OAK to LAX · Los Angelesthin sample	169	79.0%	48 min	1.18%	B
OAK to SLC · Salt Lake Citythin sample	137	86.1%	58 min	0.00%	A+
OAK to DEN · Denverthin sample	123	71.5%	36 min	0.00%	C+
OAK to SEA · Seattlethin sample	119	75.4%	47 min	0.84%	B+
OAK to LGB · Long Beachthin sample	116	86.2%	32 min	0.00%	A+
OAK to ONT · Ontariothin sample	115	74.8%	43 min	0.00%	C+
OAK to PDX · Portlandthin sample	89	77.5%	58 min	0.00%	B+
OAK to PSP · Palm Springsthin sample	71	70.0%	43 min	0.00%	C+
OAK to OGG · Kahuluithin sample	60	76.7%	82 min	0.00%	B+
OAK to HNL · Honoluluthin sample	60	70.0%	29 min	0.00%	C+
OAK to LIH · Lihuethin sample	60	73.3%	57 min	0.00%	C+
OAK to MDW · Chicagothin sample	53	90.6%	36 min	0.00%	A+
OAK to DAL · Dallasthin sample	36	69.4%	33 min	0.00%	C+
OAK to BOI · Boisethin sample	33	78.8%	47 min	0.00%	B+
OAK to AUS · Austinthin sample	30	70.0%	28 min	0.00%	C+
OAK to SBA · Santa Barbarathin sample	30	86.7%	41 min	0.00%	A+
OAK to HOU · Houstonthin sample	30	73.3%	30 min	0.00%	C+
OAK to GEG · Spokanethin sample	30	83.3%	33 min	0.00%	B+

Delay causes

What held OAK up in April

One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 27,000 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
45%
Carrier
37%
National Airspace System
17%
Extreme weather
0%
Security
0%

45% 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 27,000 reported delay minutes here, that single category outweighs weather by 45 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 27,170 reported delay minutes.

Cancellations are rare at 0.28%, below the national 0.90% 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.

5.0% of arrivals land an hour or more late, close to the national 6.4%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 45 minutes, which a normal layover absorbs.

What to do with this

Flying from OAK in April

For a April trip through OAK: plan on this being one of the airport's harder months. The 5am–8am departures held up best at 94.4% on time, and with 5.0% of arrivals an hour or more late, a connection here deserves more slack than the same trip in January would.

Oakland International (OAK), the whole year
OAK in July78.4%
OAK in August81.4%
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 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