Charles M. Schulz - Sonoma County in November 2025

77.9%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 November 2025, reporting carriers scheduled 484 domestic departures from Charles M. Schulz - Sonoma County (STS). 77.9% left less than 15 minutes late and 74.4% reached their destination on time; 3.5% were cancelled.

Nationally that month, 78.1% of flights departed on time and 77.3% arrived on time, so STS departures were level with the national departure figure.

A year earlier, in November 2024, the airport had 396 departures with 73.0% leaving on time: a change of +4.9 points, with flights up 22%.

Flights arriving at STS that month were on time 79.5% of the time (483 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 31%, national aviation system 29% and air carrier 26%.

On time 74.4%
Arrived 15+ minutes late 22.1%
Cancelled 3.5%
Diverted 0.0%

Every scheduled departure from STS in November 2025, judged by arrival at the destination.

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

Measure	Nov 2025	Nov 2024	STS, 12 months to Jul 2026	All reported flights, Nov 2025
Departed on time	77.9%	73.0%	80.4%	78.1%
Arrived on time	74.4%	66.7%	78.8%	77.3%
Cancelled	3.5%	1.0%	1.7%	2.5%
Average departure delay (late minutes only)	12.2 min	17.9 min	13.2 min	15.6 min
Scheduled departures a day	16	13	16	19,018
Scheduled departures	484	396	5,714	570,550

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	376	78%	73.9%	8.0 min	4.3%
MQ Envoy Air	78	16%	71.8%	11.0 min	1.3%
AS Alaska Airlines	30	6%	86.7%	-7.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STS–SAN	Santa Rosa to San Diego	88	68.2%	14.3 min	9.1%
STS–SNA	Santa Rosa to Santa Ana	69	72.5%	11.5 min	0.0%
STS–BUR	Santa Rosa to Burbank	59	71.2%	5.8 min	1.7%
STS–PDX	Santa Rosa to Portland	59	88.1%	2.2 min	1.7%
STS–PHX	Santa Rosa to Phoenix	51	74.5%	13.0 min	2.0%
STS–LAX	Santa Rosa to Los Angeles	50	76.0%	-0.2 min	10.0%
STS–SEA	Santa Rosa to Seattle	39	79.5%	-3.5 min	2.6%
STS–DFW	Santa Rosa to Dallas/Fort Worth	27	66.7%	7.3 min	0.0%
STS–PSP	Santa Rosa to Palm Springs	22	77.3%	2.7 min	0.0%
STS–LAS	Santa Rosa to Las Vegas	20	70.0%	16.3 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), November 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Nov 2025	Minutes
Air carrier	25.7%	30.2%	1,563
Late-arriving aircraft	30.6%	38.3%	1,859
National Aviation System	29.2%	26.7%	1,773
Extreme weather	14.5%	4.6%	880
Security	0.0%	0.1%	0

6,075 delay minutes on 107 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 STS on time in November 2025?

77.9% of 484 scheduled domestic departures left less than 15 minutes late, and 74.4% reached their destination on time. The national figures that month were 78.1% and 77.3%.

How does that compare with a year earlier?

In November 2024, 73.0% of 396 departures left on time and 1.0% were cancelled, against 77.9% and 3.5% in November 2025.

Provenance

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