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

San Diego, CA (SAN) to Washington, DC (IAD) flight delay odds

87.9% of 1,400 official scheduled SAN-to-IAD flights arrived on time; 7.1% arrived at least 30 minutes late and 0.6% 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 SIGNALLower disruption
87.9%arrived on time
7.1%30+ min late
0.6%cancelled
1,400scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.4%all scheduled flights
120+ minutes late1.1%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival-5.8 mincompleted flights

Which departure time was most reliable for SAN to IAD?

Among qualifying SAN-to-IAD departure window results, Afternoon had the highest on-time rate: 90.7% of 364 flights. Late morning was lowest at 85.3% across 292 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning41886.4%7.2%0.5%
Late morning29285.3%8.9%0.7%
Afternoon36490.7%6.3%0.3%
Night32689.3%6.4%0.9%

Which weekday was most reliable for SAN to IAD?

Among qualifying SAN-to-IAD weekday results, Tuesday had the highest on-time rate: 93.9% of 198 flights. Sunday was lowest at 80.7% across 207 flights.

DayFlightsOn time30+ minCancelled
Monday19987.4%6.5%0.0%
Tuesday19893.9%3.5%0.0%
Wednesday20287.1%7.9%0.5%
Thursday20689.3%6.8%0.5%
Friday20787.9%7.7%0.0%
Saturday18189.5%7.2%0.0%
Sunday20780.7%10.1%2.9%

Which airline was most reliable for SAN to IAD?

Among qualifying SAN-to-IAD airline results, United Airlines had the highest on-time rate: 88.5% of 1,040 flights. Alaska Airlines was lowest at 86.4% across 360 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines1,04088.5%6.8%0.5%
Alaska Airlines36086.4%8.1%0.8%

Which month was most reliable for SAN to IAD?

Among qualifying SAN-to-IAD month results, October 2025 had the highest on-time rate: 95.0% of 119 flights. July 2025 was lowest at 77.0% across 122 flights.

MonthFlightsOn time30+ minCancelled
July 202512277.0%15.6%0.0%
August 202512483.1%8.9%0.8%
September 202511993.3%5.0%0.8%
October 202511995.0%5.0%0.0%
November 202511584.3%11.3%0.0%
December 202512290.2%4.9%0.0%
January 202611284.8%8.0%4.5%
February 202610094.0%0.0%0.0%
March 202611678.4%12.9%0.9%
April 202611194.6%1.8%0.0%
May 202612089.2%8.3%0.0%
June 202612092.5%2.5%0.0%

What drove SAN to IAD delay minutes?

Airline was the largest recorded SAN-to-IAD delay category, accounting for 39.2% of 11,896 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.2%
Late aircraft18.7%
National airspace28.4%
Weather13.7%
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.