San Luis Obispo County Regional in December 2025

77.0%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 December 2025, reporting carriers scheduled 460 domestic departures from San Luis Obispo County Regional (SBP). 77.0% left less than 15 minutes late and 74.3% reached their destination on time; 1.7% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so SBP departures were 5.0 points above the national departure figure.

A year earlier, in December 2024, the airport had 505 departures with 76.2% leaving on time: a change of +0.8 points, with flights down 9%.

Flights arriving at SBP that month were on time 75.4% of the time (460 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 35%, air carrier 34% and national aviation system 26%.

On time 74.3%
Arrived 15+ minutes late 23.7%
Cancelled 1.7%
Diverted 0.2%

Every scheduled departure from SBP in December 2025, judged by arrival at the destination.

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

Measure	Dec 2025	Dec 2024	SBP, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	77.0%	76.2%	78.8%	72.0%
Arrived on time	74.3%	76.4%	75.3%	71.9%
Cancelled	1.7%	3.8%	1.2%	1.5%
Average departure delay (late minutes only)	23.6 min	24.0 min	20.9 min	21.2 min
Scheduled departures a day	15	17	14	19,410
Scheduled departures	460	505	5,010	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	256	56%	70.3%	19.2 min	2.3%
AA American Airlines	72	16%	77.8%	23.1 min	1.4%
MQ Envoy Air	70	15%	90.0%	0.6 min	0.0%
AS Alaska Airlines	31	7%	64.5%	17.3 min	3.2%
UA United Airlines	31	7%	74.2%	38.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
SBP–PHX	San Luis Obispo to Phoenix	138	88.4%	2.5 min	1.4%
SBP–SFO	San Luis Obispo to San Francisco	88	69.3%	22.4 min	2.3%
SBP–DEN	San Luis Obispo to Denver	62	72.6%	25.1 min	0.0%
SBP–SAN	San Luis Obispo to San Diego	62	67.7%	15.3 min	4.8%
SBP–LAX	San Luis Obispo to Los Angeles	32	68.8%	29.5 min	0.0%
SBP–DFW	San Luis Obispo to Dallas/Fort Worth	31	58.1%	60.8 min	0.0%
SBP–SEA	San Luis Obispo to Seattle	31	64.5%	17.3 min	3.2%
SBP–LAS	San Luis Obispo to Las Vegas	16	75.0%	5.8 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	34.0%	33.3%	3,586
Late-arriving aircraft	35.4%	41.1%	3,739
National Aviation System	26.4%	19.1%	2,791
Extreme weather	3.9%	6.4%	416
Security	0.2%	0.2%	22

10,554 delay minutes on 109 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 December 2025?

77.0% of 460 scheduled domestic departures left less than 15 minutes late, and 74.3% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 76.2% of 505 departures left on time and 3.8% were cancelled, against 77.0% and 1.7% in December 2025.

Provenance

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