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

San Francisco, CA (SFO) to Washington, DC (IAD) flight delay odds

Historically, 81.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,788 flights.

HISTORICAL ROUTE SIGNALLower disruption
81.8%arrived on time
11.3%30+ min late
0.8%cancelled
2,788scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.9%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+0.9 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 morning50285.1%8.8%1.6%
Late morning41575.4%15.9%0.2%
Afternoon73779.5%13.3%0.7%
Night1,11884.1%9.6%0.6%

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
Monday40182.5%9.7%0.5%
Tuesday38284.0%8.4%0.0%
Wednesday39380.2%13.5%0.3%
Thursday40682.3%11.8%0.7%
Friday40983.4%10.3%0.2%
Saturday38980.7%12.3%0.8%
Sunday40879.7%13.0%2.7%

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 Airlines2,69083.1%10.3%0.7%
Alaska Airlines9845.9%37.8%1.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202526764.4%25.8%0.7%
August 202525478.7%12.2%1.2%
September 202520681.1%7.8%0.0%
October 202524788.7%6.9%0.4%
November 202522985.6%10.0%0.4%
December 202524586.5%8.2%0.0%
January 202620985.6%8.1%3.8%
February 202618992.1%6.3%0.0%
March 202620984.2%8.6%2.4%
April 202623183.5%10.4%0.4%
May 202626883.2%9.0%0.0%
June 202623472.6%18.8%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.

Airline40.9%
Late aircraft40.0%
National airspace18.4%
Weather0.6%
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.