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

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

Historically, 81.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 613 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

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

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.