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

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

Historically, 80.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 3,514 flights.

HISTORICAL ROUTE SIGNALLower disruption
80.1%arrived on time
12.5%30+ min late
0.3%cancelled
3,514scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.0%all scheduled flights
120+ minutes late2.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+4.3 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 morning52791.1%5.1%0.8%
Late morning61678.1%13.3%0.5%
Afternoon1,12775.9%14.4%0.4%
Evening73780.7%13.2%0.1%
Night50779.7%13.8%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
Monday53278.8%13.2%0.4%
Tuesday49285.0%8.7%0.4%
Wednesday48280.1%10.2%0.0%
Thursday52174.7%17.3%0.6%
Friday52478.2%15.3%0.6%
Saturday44186.6%8.8%0.0%
Sunday52278.7%12.8%0.4%

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
United Airlines1,66181.0%11.9%0.2%
Alaska Airlines1,38379.8%12.7%0.5%
SkyWest Airlines45778.1%13.8%0.2%
Frontier Airlines1369.2%15.4%7.7%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202531581.0%10.2%0.3%
August 202532785.0%8.9%0.6%
September 202532887.2%8.2%0.0%
October 202534482.8%9.0%0.0%
November 202528077.5%13.9%1.8%
December 202523578.3%14.9%0.4%
January 202625485.8%12.6%0.0%
February 202625484.6%10.6%0.0%
March 202628988.9%6.9%0.3%
April 202630073.3%17.0%0.7%
May 202629967.9%20.7%0.0%
June 202628968.2%18.3%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.

Airline30.6%
Late aircraft58.3%
National airspace10.6%
Weather0.5%
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.