BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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SEA→STS

Seattle, WA (SEA) to Santa Rosa, CA (STS) flight delay odds

79.9% of 428 official scheduled SEA-to-STS flights arrived on time; 10.3% arrived at least 30 minutes late and 2.1% 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 SIGNALGenerally reliable
79.9%arrived on time
10.3%30+ min late
2.1%cancelled
428scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.7%all scheduled flights
120+ minutes late0.9%all scheduled flights
Diverted0.7%did not reach as scheduled
Average arrival+0.8 mincompleted flights

Which departure time was most reliable for SEA to STS?

Among qualifying SEA-to-STS departure window results, Afternoon had the highest on-time rate: 97.8% of 45 flights. Evening was lowest at 79.0% across 105 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning25879.1%11.2%0.8%
Afternoon4597.8%0.0%0.0%
Evening10579.0%14.3%1.0%

Which weekday was most reliable for SEA to STS?

Among qualifying SEA-to-STS weekday results, Tuesday had the highest on-time rate: 86.2% of 58 flights. Friday was lowest at 68.3% across 63 flights.

DayFlightsOn time30+ minCancelled
Monday6581.5%7.7%0.0%
Tuesday5886.2%10.3%0.0%
Wednesday5780.7%12.3%0.0%
Thursday6484.4%7.8%1.6%
Friday6368.3%14.3%9.5%
Saturday5678.6%12.5%0.0%
Sunday6580.0%7.7%3.1%

Which airline was most reliable for SEA to STS?

Among qualifying SEA-to-STS airline results, Alaska Airlines had the highest on-time rate: 81.7% of 356 flights. SkyWest Airlines was lowest at 70.8% across 72 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines35681.7%8.4%2.5%
SkyWest Airlines7270.8%19.4%0.0%

Which month was most reliable for SEA to STS?

Among qualifying SEA-to-STS month results, May 2026 had the highest on-time rate: 100.0% of 31 flights. January 2026 was lowest at 45.0% across 20 flights.

MonthFlightsOn time30+ minCancelled
July 20256162.3%24.6%0.0%
August 20256277.4%14.5%1.6%
September 20256085.0%8.3%0.0%
October 20253390.9%3.0%0.0%
November 20253997.4%2.6%0.0%
December 20253053.3%20.0%6.7%
January 20262045.0%5.0%25.0%
April 20263096.7%0.0%0.0%
May 202631100.0%0.0%0.0%
June 20264278.6%14.3%0.0%

What drove SEA to STS delay minutes?

Late aircraft was the largest recorded SEA-to-STS delay category, accounting for 45.4% of 3,771 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.7%
Late aircraft45.4%
National airspace20.1%
Weather0.8%
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.