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

Washington, DC (IAD) to Sacramento, CA (SMF) flight delay odds

77.0% of 365 official scheduled IAD-to-SMF flights arrived on time; 15.9% arrived at least 30 minutes late and 1.1% 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
77.0%arrived on time
15.9%30+ min late
1.1%cancelled
365scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.7%all scheduled flights
120+ minutes late3.0%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+3.9 mincompleted flights

Which departure time was most reliable for IAD to SMF?

Only Evening met the IAD-to-SMF departure window threshold: 77.0% of 365 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Evening36577.0%15.9%1.1%

Which weekday was most reliable for IAD to SMF?

Among qualifying IAD-to-SMF weekday results, Tuesday had the highest on-time rate: 84.9% of 53 flights. Sunday was lowest at 71.2% across 52 flights.

DayFlightsOn time30+ minCancelled
Monday5278.8%13.5%0.0%
Tuesday5384.9%11.3%0.0%
Wednesday5271.2%19.2%1.9%
Thursday5280.8%13.5%1.9%
Friday5273.1%17.3%0.0%
Saturday5278.8%15.4%0.0%
Sunday5271.2%21.2%3.8%

Which airline was most reliable for IAD to SMF?

Only United Airlines met the IAD-to-SMF airline threshold: 77.0% of 365 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines36577.0%15.9%1.1%

Which month was most reliable for IAD to SMF?

Among qualifying IAD-to-SMF month results, November 2025 had the highest on-time rate: 93.3% of 30 flights. July 2025 was lowest at 35.5% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253135.5%54.8%0.0%
August 20253183.9%9.7%0.0%
September 20253086.7%10.0%0.0%
October 20253183.9%9.7%0.0%
November 20253093.3%6.7%0.0%
December 20253164.5%19.4%0.0%
January 20263171.0%12.9%3.2%
February 20262885.7%10.7%0.0%
March 20263183.9%16.1%0.0%
April 20263086.7%6.7%0.0%
May 20263180.6%12.9%3.2%
June 20263070.0%20.0%6.7%

What drove IAD to SMF delay minutes?

Late aircraft was the largest recorded IAD-to-SMF delay category, accounting for 35.8% of 4,961 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.3%
Late aircraft35.8%
National airspace19.6%
Weather11.2%
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.