Charles M. Schulz - Sonoma County in April 2024

85.7%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 April 2024, reporting carriers scheduled 265 domestic departures from Charles M. Schulz - Sonoma County (STS). 85.7% left less than 15 minutes late and 80.0% reached their destination on time; 0.0% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.2% arrived on time, so STS departures were 5.2 points above the national departure figure.

Flights arriving at STS that month were on time 81.1% of the time (264 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, national aviation system 28% and air carrier 18%.

On time 80.0%
Arrived 15+ minutes late 20.0%
Cancelled 0.0%
Diverted 0.0%

Every scheduled departure from STS in April 2024, judged by arrival at the destination.

April 2024 against a year earlier, the airport's year and the nation

Measure	Apr 2024	Year earlier	STS, 12 months to Jul 2026	All reported flights, Apr 2024
Departed on time	85.7%	—	80.4%	80.5%
Arrived on time	80.0%	—	78.8%	80.2%
Cancelled	0.0%	—	1.7%	0.7%
Average departure delay (late minutes only)	9.1 min	—	13.2 min	14.2 min
Scheduled departures a day	9	—	16	19,406
Scheduled departures	265	—	5,714	582,185

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	208	78%	78.8%	8.2 min	0.0%
AS Alaska Airlines	30	11%	83.3%	2.1 min	0.0%
MQ Envoy Air	27	10%	85.2%	2.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STS–SAN	Santa Rosa to San Diego	58	82.8%	11.1 min	0.0%
STS–PHX	Santa Rosa to Phoenix	57	87.7%	-0.2 min	0.0%
STS–SNA	Santa Rosa to Santa Ana	45	75.6%	8.0 min	0.0%
STS–PDX	Santa Rosa to Portland	34	82.4%	9.0 min	0.0%
STS–SEA	Santa Rosa to Seattle	30	83.3%	2.1 min	0.0%
STS–LAX	Santa Rosa to Los Angeles	24	83.3%	2.7 min	0.0%
STS–BUR	Santa Rosa to Burbank	17	41.2%	23.0 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), April 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2024	Minutes
Air carrier	18.4%	33.6%	494
Late-arriving aircraft	46.2%	41.0%	1,237
National Aviation System	27.9%	20.0%	746
Extreme weather	7.5%	5.1%	201
Security	0.0%	0.2%	0

2,678 delay minutes on 53 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 April 2024?

85.7% of 265 scheduled domestic departures left less than 15 minutes late, and 80.0% reached their destination on time. The national figures that month were 80.5% and 80.2%.

How does that compare with a year earlier?

April 2023 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 April 2024; 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.