San Luis Obispo County Regional in May 2025

80.9%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 482 domestic departures from San Luis Obispo County Regional (SBP). 80.9% left less than 15 minutes late and 77.8% reached their destination on time; 0.6% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so SBP departures were 4.2 points above the national departure figure.

A year earlier, in May 2024, the airport had 400 departures with 86.3% leaving on time: a change of −5.4 points, with flights up 21%.

Flights arriving at SBP that month were on time 76.6% of the time (482 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 34%, air carrier 31% and late-arriving aircraft 28%.

On time 77.8%
Arrived 15+ minutes late 21.2%
Cancelled 0.6%
Diverted 0.4%

Every scheduled departure from SBP 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	SBP, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	80.9%	86.3%	78.8%	76.7%
Arrived on time	77.8%	84.8%	75.3%	75.4%
Cancelled	0.6%	0.5%	1.2%	1.0%
Average departure delay (late minutes only)	19.1 min	15.6 min	20.9 min	17.5 min
Scheduled departures a day	16	13	14	20,188
Scheduled departures	482	400	5,010	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	294	61%	80.3%	9.5 min	0.0%
MQ Envoy Air	68	14%	88.2%	8.7 min	1.5%
AA American Airlines	58	12%	70.7%	23.9 min	0.0%
AS Alaska Airlines	31	6%	48.4%	17.5 min	0.0%
UA United Airlines	31	6%	74.2%	34.9 min	6.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SBP–SFO	San Luis Obispo to San Francisco	108	75.0%	14.4 min	0.0%
SBP–PHX	San Luis Obispo to Phoenix	95	87.4%	11.5 min	1.1%
SBP–DEN	San Luis Obispo to Denver	62	69.4%	30.5 min	3.2%
SBP–LAX	San Luis Obispo to Los Angeles	62	91.9%	-2.0 min	0.0%
SBP–SAN	San Luis Obispo to San Diego	62	80.6%	8.7 min	0.0%
SBP–DFW	San Luis Obispo to Dallas/Fort Worth	31	58.1%	28.7 min	0.0%
SBP–PDX	San Luis Obispo to Portland	31	90.3%	0.2 min	0.0%
SBP–SEA	San Luis Obispo to Seattle	31	48.4%	17.5 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	30.5%	29.3%	2,900
Late-arriving aircraft	28.1%	37.8%	2,667
National Aviation System	34.2%	25.9%	3,248
Extreme weather	1.4%	6.9%	132
Security	5.8%	0.1%	552

9,499 delay minutes on 102 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 SBP on time in May 2025?

80.9% of 482 scheduled domestic departures left less than 15 minutes late, and 77.8% 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, 86.3% of 400 departures left on time and 0.5% were cancelled, against 80.9% and 0.6% 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 SBP · methodology · corrections.