Charles M. Schulz - Sonoma County in October 2023

86.1%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 October 2023, reporting carriers scheduled 332 domestic departures from Charles M. Schulz - Sonoma County (STS). 86.1% left less than 15 minutes late and 81.6% reached their destination on time; 0.0% were cancelled.

Nationally that month, 83.8% of flights departed on time and 84.0% arrived on time, so STS departures were 2.3 points above the national departure figure.

Flights arriving at STS that month were on time 86.2% of the time (333 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 36%, air carrier 28% and extreme weather 27%.

On time 81.6%
Arrived 15+ minutes late 18.4%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from STS in October 2023, judged by arrival at the destination.

October 2023 against a year earlier, the airport's year and the nation

Measure	Oct 2023	Year earlier	STS, 12 months to Jul 2026	All reported flights, Oct 2023
Departed on time	86.1%	—	80.4%	83.8%
Arrived on time	81.6%	—	78.8%	84.0%
Cancelled	0.0%	—	1.7%	0.4%
Average departure delay (late minutes only)	12.3 min	—	13.2 min	11.0 min
Scheduled departures a day	11	—	16	19,966
Scheduled departures	332	—	5,714	598,968

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	252	76%	79.8%	11.3 min	0.0%
MQ Envoy Air	62	19%	90.3%	6.1 min	0.0%
AS Alaska Airlines	18	5%	77.8%	8.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STS–SNA	Santa Rosa to Santa Ana	62	83.9%	11.1 min	0.0%
STS–SAN	Santa Rosa to San Diego	61	90.2%	-1.7 min	0.0%
STS–PHX	Santa Rosa to Phoenix	58	96.6%	-1.2 min	0.0%
STS–LAX	Santa Rosa to Los Angeles	49	61.2%	31.8 min	0.0%
STS–SEA	Santa Rosa to Seattle	49	71.4%	17.9 min	0.0%
STS–DFW	Santa Rosa to Dallas/Fort Worth	31	83.9%	8.2 min	0.0%
STS–BUR	Santa Rosa to Burbank	22	77.3%	8.0 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), October 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2023	Minutes
Air carrier	28.2%	41.3%	1,269
Late-arriving aircraft	36.4%	40.5%	1,636
National Aviation System	8.7%	14.4%	392
Extreme weather	26.6%	3.7%	1,196
Security	0.0%	0.2%	0

4,493 delay minutes on 61 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 October 2023?

86.1% of 332 scheduled domestic departures left less than 15 minutes late, and 81.6% reached their destination on time. The national figures that month were 83.8% and 84.0%.

How does that compare with a year earlier?

October 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for October 2023; 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.