Oakland International in September 2025

78.6%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In September 2025, reporting carriers scheduled 2,714 domestic departures from Oakland International (OAK). 78.6% left less than 15 minutes late and 82.0% reached their destination on time; 0.3% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so OAK departures were 4.5 points below the national departure figure.

A year earlier, in September 2024, the airport had 3,393 departures with 82.4% leaving on time: a change of −3.8 points, with flights down 20%.

Flights arriving at OAK that month were on time 81.7% of the time (2,714 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, air carrier 32% and national aviation system 16%.

On time 82.0%
Arrived 15+ minutes late 17.5%
Cancelled 0.3%
Diverted 0.2%

Every scheduled departure from OAK in September 2025, judged by arrival at the destination.

September 2025 against a year earlier, the airport's year and the nation

Measure	Sep 2025	Sep 2024	OAK, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	78.6%	82.4%	75.5%	83.1%
Arrived on time	82.0%	84.7%	78.5%	82.8%
Cancelled	0.3%	0.4%	0.6%	0.5%
Average departure delay (late minutes only)	11.0 min	10.2 min	13.4 min	12.2 min
Scheduled departures a day	91	113	86	18,748
Scheduled departures	2,714	3,393	31,406	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,420	89%	80.9%	3.5 min	0.3%
HA Hawaiian Airlines	90	3%	87.8%	-4.7 min	0.0%
OO SkyWest Airlines	90	3%	95.6%	-7.4 min	0.0%
NK Spirit Airlines	54	2%	90.7%	-10.4 min	1.9%
AS Alaska Airlines	46	2%	87.0%	-4.2 min	0.0%
G4 Allegiant Air	14	1%	92.9%	-2.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
OAK–LAS	Oakland to Las Vegas	300	79.3%	7.4 min	1.0%
OAK–SAN	Oakland to San Diego	275	70.9%	10.6 min	0.7%
OAK–BUR	Oakland to Burbank	254	87.8%	-3.4 min	0.0%
OAK–SNA	Oakland to Santa Ana	193	81.3%	0.6 min	1.6%
OAK–LAX	Oakland to Los Angeles	181	84.0%	-1.7 min	0.0%
OAK–SEA	Oakland to Seattle	166	74.7%	5.0 min	0.0%
OAK–LGB	Oakland to Long Beach	146	82.9%	-0.4 min	0.0%
OAK–SLC	Oakland to Salt Lake City	146	91.8%	-4.6 min	0.0%
OAK–DEN	Oakland to Denver	137	71.5%	10.9 min	0.0%
OAK–PHX	Oakland to Phoenix	134	78.4%	12.8 min	0.0%
OAK–ONT	Oakland to Ontario	133	87.2%	0.9 min	0.0%
OAK–PDX	Oakland to Portland	99	86.9%	1.9 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	31.7%	34.3%	7,142
Late-arriving aircraft	50.8%	37.4%	11,447
National Aviation System	15.9%	22.6%	3,586
Extreme weather	1.6%	5.6%	366
Security	0.0%	0.1%	0

22,541 delay minutes on 476 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left OAK on time in September 2025?

78.6% of 2,714 scheduled domestic departures left less than 15 minutes late, and 82.0% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 82.4% of 3,393 departures left on time and 0.4% were cancelled, against 78.6% and 0.3% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for OAK · methodology · corrections.