Oakland International in May 2025

82.8%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 May 2025, reporting carriers scheduled 3,216 domestic departures from Oakland International (OAK). 82.8% left less than 15 minutes late and 84.5% reached their destination on time; 0.4% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so OAK departures were 6.1 points above the national departure figure.

A year earlier, in May 2024, the airport had 3,610 departures with 79.1% leaving on time: a change of +3.7 points, with flights down 11%.

Flights arriving at OAK that month were on time 81.5% of the time (3,218 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, air carrier 29% and national aviation system 18%.

On time 84.5%
Arrived 15+ minutes late 14.8%
Cancelled 0.4%
Diverted 0.2%

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

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

Measure	May 2025	May 2024	OAK, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	82.8%	79.1%	75.5%	76.7%
Arrived on time	84.5%	82.0%	78.5%	75.4%
Cancelled	0.4%	0.4%	0.6%	1.0%
Average departure delay (late minutes only)	9.6 min	11.9 min	13.4 min	17.5 min
Scheduled departures a day	107	120	86	20,188
Scheduled departures	3,216	3,610	31,406	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,787	87%	84.0%	0.9 min	0.3%
NK Spirit Airlines	166	5%	87.3%	-3.0 min	1.8%
HA Hawaiian Airlines	92	3%	87.0%	-0.7 min	2.2%
AS Alaska Airlines	62	2%	80.6%	1.6 min	0.0%
OO SkyWest Airlines	62	2%	95.2%	-10.7 min	0.0%
DL Delta Air Lines	31	1%	100.0%	-9.3 min	0.0%
G4 Allegiant Air	16	0%	87.5%	-11.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
OAK–LAS	Oakland to Las Vegas	400	82.3%	2.9 min	0.5%
OAK–SAN	Oakland to San Diego	299	83.3%	3.1 min	0.3%
OAK–BUR	Oakland to Burbank	266	86.5%	-2.3 min	0.8%
OAK–SNA	Oakland to Santa Ana	255	87.8%	-4.9 min	0.4%
OAK–LAX	Oakland to Los Angeles	204	91.2%	-7.1 min	0.5%
OAK–PHX	Oakland to Phoenix	189	81.5%	4.4 min	0.0%
OAK–SLC	Oakland to Salt Lake City	163	91.4%	-4.8 min	0.0%
OAK–DEN	Oakland to Denver	157	72.6%	13.6 min	0.0%
OAK–LGB	Oakland to Long Beach	154	87.7%	-4.3 min	0.0%
OAK–SEA	Oakland to Seattle	148	76.4%	3.9 min	0.0%
OAK–ONT	Oakland to Ontario	146	87.0%	-1.6 min	1.4%
OAK–PDX	Oakland to Portland	126	88.9%	0.3 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	28.9%	29.3%	6,862
Late-arriving aircraft	51.0%	37.8%	12,112
National Aviation System	18.2%	25.9%	4,322
Extreme weather	1.8%	6.9%	417
Security	0.1%	0.1%	27

23,740 delay minutes on 477 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 May 2025?

82.8% of 3,216 scheduled domestic departures left less than 15 minutes late, and 84.5% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 79.1% of 3,610 departures left on time and 0.4% were cancelled, against 82.8% and 0.4% in May 2025.

Provenance

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