Oakland International in April 2025

82.7%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 April 2025, reporting carriers scheduled 3,050 domestic departures from Oakland International (OAK). 82.7% left less than 15 minutes late and 85.0% reached their destination on time; 0.3% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so OAK departures were 2.1 points above the national departure figure.

A year earlier, in April 2024, the airport had 3,512 departures with 83.5% leaving on time: a change of −0.8 points, with flights down 13%.

Flights arriving at OAK that month were on time 83.3% of the time (3,051 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 40% and national aviation system 16%.

On time 85.0%
Arrived 15+ minutes late 14.6%
Cancelled 0.3%
Diverted 0.1%

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

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

Measure	Apr 2025	Apr 2024	OAK, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	82.7%	83.5%	75.5%	80.6%
Arrived on time	85.0%	85.8%	78.5%	79.5%
Cancelled	0.3%	0.4%	0.6%	0.8%
Average departure delay (late minutes only)	10.6 min	8.6 min	13.4 min	14.1 min
Scheduled departures a day	102	117	86	19,465
Scheduled departures	3,050	3,512	31,406	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,696	88%	84.2%	1.5 min	0.3%
NK Spirit Airlines	127	4%	91.3%	-2.4 min	0.0%
HA Hawaiian Airlines	90	3%	88.9%	14.0 min	0.0%
OO SkyWest Airlines	60	2%	96.7%	-8.9 min	0.0%
AS Alaska Airlines	39	1%	92.3%	-5.8 min	0.0%
DL Delta Air Lines	30	1%	93.3%	-4.8 min	0.0%
G4 Allegiant Air	8	0%	87.5%	-4.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
OAK–LAS	Oakland to Las Vegas	365	83.8%	1.5 min	0.3%
OAK–SAN	Oakland to San Diego	288	77.8%	8.9 min	1.0%
OAK–BUR	Oakland to Burbank	266	88.0%	-0.9 min	0.8%
OAK–SNA	Oakland to Santa Ana	222	90.5%	-6.3 min	0.0%
OAK–LAX	Oakland to Los Angeles	196	82.7%	1.4 min	1.0%
OAK–PHX	Oakland to Phoenix	185	83.2%	5.0 min	0.0%
OAK–SLC	Oakland to Salt Lake City	158	89.2%	-2.4 min	0.0%
OAK–DEN	Oakland to Denver	150	74.0%	9.4 min	0.0%
OAK–LGB	Oakland to Long Beach	148	91.2%	-6.7 min	0.0%
OAK–ONT	Oakland to Ontario	132	84.8%	-0.6 min	0.0%
OAK–SEA	Oakland to Seattle	125	88.0%	-0.4 min	0.0%
OAK–PDX	Oakland to Portland	123	85.4%	-0.7 min	0.0%

By scheduled departure hour

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

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

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	39.6%	32.7%	10,004
Late-arriving aircraft	44.0%	39.4%	11,098
National Aviation System	15.8%	22.2%	3,980
Extreme weather	0.4%	5.5%	95
Security	0.3%	0.2%	69

25,246 delay minutes on 444 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 April 2025?

82.7% of 3,050 scheduled domestic departures left less than 15 minutes late, and 85.0% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 83.5% of 3,512 departures left on time and 0.4% were cancelled, against 82.7% and 0.3% in April 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 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.