BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
STS→SAN

Santa Rosa, CA (STS) to San Diego, CA (SAN) flight delay odds

74.0% of 959 official scheduled STS-to-SAN flights arrived on time; 14.6% arrived at least 30 minutes late and 2.5% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
74.0%arrived on time
14.6%30+ min late
2.5%cancelled
959scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.9%all scheduled flights
120+ minutes late2.9%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+8.9 mincompleted flights

Which departure time was most reliable for STS to SAN?

Among qualifying STS-to-SAN departure window results, Early morning had the highest on-time rate: 85.6% of 362 flights. Evening was lowest at 59.9% across 257 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36285.6%5.2%5.2%
Late morning14374.1%16.1%0.0%
Afternoon19771.1%15.2%0.0%
Evening25759.9%26.5%1.9%

Which weekday was most reliable for STS to SAN?

Among qualifying STS-to-SAN weekday results, Wednesday had the highest on-time rate: 86.0% of 121 flights. Friday was lowest at 66.4% across 152 flights.

DayFlightsOn time30+ minCancelled
Monday15371.2%16.3%0.7%
Tuesday11979.8%7.6%5.0%
Wednesday12186.0%5.8%3.3%
Thursday14968.5%19.5%1.3%
Friday15266.4%21.7%2.6%
Saturday11580.0%12.2%1.7%
Sunday15071.3%15.3%3.3%

Which airline was most reliable for STS to SAN?

Among qualifying STS-to-SAN airline results, Southwest Airlines had the highest on-time rate: 80.3% of 132 flights. SkyWest Airlines was lowest at 73.0% across 827 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines82773.0%14.9%2.9%
Southwest Airlines13280.3%12.9%0.0%

Which month was most reliable for STS to SAN?

Among qualifying STS-to-SAN month results, July 2025 had the highest on-time rate: 85.2% of 61 flights. December 2025 was lowest at 55.8% across 52 flights.

MonthFlightsOn time30+ minCancelled
July 20256185.2%8.2%0.0%
August 20257177.5%11.3%0.0%
September 20258170.4%13.6%2.5%
October 20258676.7%10.5%4.7%
November 20258868.2%14.8%9.1%
December 20255255.8%26.9%9.6%
January 20265472.2%9.3%5.6%
February 20264465.9%22.7%0.0%
March 20266976.8%17.4%0.0%
April 202611275.0%15.2%0.0%
May 202612580.0%12.8%0.8%
June 202611674.1%17.2%0.9%

What drove STS to SAN delay minutes?

Late aircraft was the largest recorded STS-to-SAN delay category, accounting for 40.4% of 13,431 BTS-attributed delay minutes during July 2025–June 2026.

Airline29.9%
Late aircraft40.4%
National airspace23.9%
Weather5.8%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.