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

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

88.9% of 578 official scheduled STS-to-PDX flights arrived on time; 7.3% arrived at least 30 minutes late and 1.6% 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
88.9%arrived on time
7.3%30+ min late
1.6%cancelled
578scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.2%all scheduled flights
120+ minutes late1.6%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival-4.1 mincompleted flights

Which departure time was most reliable for STS to PDX?

Among qualifying STS-to-PDX departure window results, Late morning had the highest on-time rate: 92.3% of 130 flights. Early morning was lowest at 84.1% across 69 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning6984.1%2.9%10.1%
Late morning13092.3%6.9%0.0%
Afternoon14188.7%9.9%0.0%
Evening23888.7%7.1%0.8%

Which weekday was most reliable for STS to PDX?

Among qualifying STS-to-PDX weekday results, Thursday had the highest on-time rate: 92.2% of 90 flights. Saturday was lowest at 79.2% across 72 flights.

DayFlightsOn time30+ minCancelled
Monday9191.2%4.4%1.1%
Tuesday8088.8%8.8%1.2%
Wednesday7091.4%2.9%0.0%
Thursday9092.2%6.7%0.0%
Friday9191.2%6.6%1.1%
Saturday7279.2%12.5%6.9%
Sunday8486.9%9.5%1.2%

Which airline was most reliable for STS to PDX?

Only SkyWest Airlines met the STS-to-PDX airline threshold: 89.9% of 552 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines55289.9%7.4%0.4%
Alaska Airlines2669.2%3.8%26.9%

Which month was most reliable for STS to PDX?

Among qualifying STS-to-PDX month results, March 2026 had the highest on-time rate: 97.8% of 45 flights. December 2025 was lowest at 70.5% across 44 flights.

MonthFlightsOn time30+ minCancelled
July 20253196.8%3.2%0.0%
August 20254386.0%9.3%0.0%
September 20256095.0%5.0%0.0%
October 20253697.2%2.8%0.0%
November 20255988.1%8.5%1.7%
December 20254470.5%20.5%2.3%
January 20264881.2%6.2%12.5%
February 20263183.9%12.9%3.2%
March 20264597.8%2.2%0.0%
April 20265088.0%12.0%0.0%
May 20267088.6%5.7%0.0%
June 20266193.4%1.6%0.0%

What drove STS to PDX delay minutes?

Late aircraft was the largest recorded STS-to-PDX delay category, accounting for 65.7% of 3,955 BTS-attributed delay minutes during July 2025–June 2026.

Airline19.5%
Late aircraft65.7%
National airspace10.5%
Weather4.3%
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.