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

Portland, OR (PDX) to Santa Rosa, CA (STS) flight delay odds

81.6% of 613 official scheduled PDX-to-STS flights arrived on time; 9.8% arrived at least 30 minutes late and 0.5% 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 SIGNALLower disruption
81.6%arrived on time
9.8%30+ min late
0.5%cancelled
613scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.5%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted1.8%did not reach as scheduled
Average arrival+1.6 mincompleted flights

Which departure time was most reliable for PDX to STS?

Among qualifying PDX-to-STS departure window results, Afternoon had the highest on-time rate: 91.4% of 174 flights. Early morning was lowest at 72.6% across 241 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning24172.6%14.1%0.8%
Afternoon17491.4%4.0%0.0%
Evening15383.0%9.2%0.7%
Night4087.5%10.0%0.0%

Which weekday was most reliable for PDX to STS?

Among qualifying PDX-to-STS weekday results, Thursday had the highest on-time rate: 85.1% of 94 flights. Sunday was lowest at 75.0% across 96 flights.

DayFlightsOn time30+ minCancelled
Monday9681.2%11.5%0.0%
Tuesday7882.1%6.4%0.0%
Wednesday8384.3%6.0%1.2%
Thursday9485.1%7.4%0.0%
Friday9681.2%9.4%2.1%
Saturday7082.9%10.0%0.0%
Sunday9675.0%16.7%0.0%

Which airline was most reliable for PDX to STS?

Only SkyWest Airlines met the PDX-to-STS airline threshold: 81.8% of 587 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines58781.8%9.5%0.3%
Alaska Airlines2676.9%15.4%3.8%

Which month was most reliable for PDX to STS?

Among qualifying PDX-to-STS month results, May 2026 had the highest on-time rate: 92.9% of 70 flights. December 2025 was lowest at 52.3% across 44 flights.

MonthFlightsOn time30+ minCancelled
July 20253180.6%6.5%0.0%
August 20254381.4%9.3%0.0%
September 20256086.7%5.0%0.0%
October 20253675.0%5.6%0.0%
November 20255870.7%19.0%0.0%
December 20254452.3%25.0%4.5%
January 20264872.9%18.8%2.1%
February 20264883.3%8.3%0.0%
March 20266287.1%6.5%0.0%
April 20265090.0%6.0%0.0%
May 20267092.9%7.1%0.0%
June 20266392.1%3.2%0.0%

What drove PDX to STS delay minutes?

Airline was the largest recorded PDX-to-STS delay category, accounting for 38.4% of 6,380 BTS-attributed delay minutes during July 2025–June 2026.

Airline38.4%
Late aircraft20.0%
National airspace10.5%
Weather31.0%
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.