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

Portland, OR (PDX) to San Francisco, CA (SFO) flight delay odds

71.9% of 3,516 official scheduled PDX-to-SFO flights arrived on time; 17.5% arrived at least 30 minutes late and 0.4% 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
71.9%arrived on time
17.5%30+ min late
0.4%cancelled
3,516scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.6%all scheduled flights
120+ minutes late3.0%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+10.3 mincompleted flights

Which departure time was most reliable for PDX to SFO?

Among qualifying PDX-to-SFO departure window results, Afternoon had the highest on-time rate: 79.3% of 943 flights. Evening was lowest at 64.8% across 799 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,08772.0%17.9%0.4%
Late morning58069.1%17.1%0.5%
Afternoon94379.3%13.1%0.4%
Evening79964.8%22.5%0.4%
Night10773.8%15.9%0.9%

Which weekday was most reliable for PDX to SFO?

Among qualifying PDX-to-SFO weekday results, Saturday had the highest on-time rate: 79.5% of 443 flights. Thursday was lowest at 67.0% across 518 flights.

DayFlightsOn time30+ minCancelled
Monday53371.1%18.0%0.6%
Tuesday49677.0%11.7%0.2%
Wednesday48469.8%16.7%0.2%
Thursday51867.0%22.0%0.6%
Friday52270.1%19.5%0.4%
Saturday44379.5%14.2%0.9%
Sunday52070.2%19.4%0.2%

Which airline was most reliable for PDX to SFO?

Among qualifying PDX-to-SFO airline results, SkyWest Airlines had the highest on-time rate: 83.6% of 458 flights. United Airlines was lowest at 68.9% across 1,661 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,66168.9%19.1%0.3%
Alaska Airlines1,38371.6%17.9%0.5%
SkyWest Airlines45883.6%11.1%0.4%
Frontier Airlines1485.7%0.0%7.1%

Which month was most reliable for PDX to SFO?

Among qualifying PDX-to-SFO month results, March 2026 had the highest on-time rate: 88.9% of 288 flights. May 2026 was lowest at 47.5% across 299 flights.

MonthFlightsOn time30+ minCancelled
July 202531677.8%10.4%0.9%
August 202532581.2%11.4%0.3%
September 202532980.2%8.5%0.0%
October 202534374.6%16.6%0.3%
November 202528075.0%14.3%1.8%
December 202523873.1%17.6%0.4%
January 202625382.6%11.9%0.8%
February 202625671.5%16.8%0.0%
March 202628888.9%7.3%0.0%
April 202630057.0%28.3%0.3%
May 202629947.5%38.1%0.3%
June 202628953.3%29.4%0.0%

What drove PDX to SFO delay minutes?

National airspace was the largest recorded PDX-to-SFO delay category, accounting for 60.9% of 56,408 BTS-attributed delay minutes during July 2025–June 2026.

Airline14.2%
Late aircraft24.6%
National airspace60.9%
Weather0.3%
Security0.1%
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.