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

Sacramento, CA (SMF) to Ontario, CA (ONT) flight delay odds

84.4% of 2,111 official scheduled SMF-to-ONT flights arrived on time; 8.9% arrived at least 30 minutes late and 0.2% 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
84.4%arrived on time
8.9%30+ min late
0.2%cancelled
2,111scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.7%all scheduled flights
120+ minutes late1.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+1.2 mincompleted flights

Which departure time was most reliable for SMF to ONT?

Among qualifying SMF-to-ONT departure window results, Early morning had the highest on-time rate: 93.4% of 519 flights. Evening was lowest at 78.3% across 585 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning51993.4%3.5%0.6%
Late morning41488.9%4.6%0.2%
Afternoon56380.5%10.7%0.0%
Evening58578.3%14.2%0.2%

Which weekday was most reliable for SMF to ONT?

Among qualifying SMF-to-ONT weekday results, Wednesday had the highest on-time rate: 87.7% of 302 flights. Thursday was lowest at 82.2% across 342 flights.

DayFlightsOn time30+ minCancelled
Monday34684.4%6.9%0.6%
Tuesday31185.2%9.6%0.0%
Wednesday30287.7%7.0%0.3%
Thursday34282.2%10.5%0.0%
Friday34283.6%9.1%0.6%
Saturday18185.6%8.3%0.0%
Sunday28782.9%10.8%0.0%

Which airline was most reliable for SMF to ONT?

Only Southwest Airlines met the SMF-to-ONT airline threshold: 84.4% of 2,111 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines2,11184.4%8.9%0.2%

Which month was most reliable for SMF to ONT?

Among qualifying SMF-to-ONT month results, September 2025 had the highest on-time rate: 89.3% of 177 flights. June 2026 was lowest at 74.6% across 177 flights.

MonthFlightsOn time30+ minCancelled
July 202517987.2%7.8%0.0%
August 202517888.8%7.9%1.1%
September 202517789.3%6.2%0.0%
October 202518184.5%9.9%0.0%
November 202517886.0%10.1%0.0%
December 202517979.3%11.2%0.6%
January 202615585.2%7.1%0.0%
February 202615284.9%8.6%0.0%
March 202618487.0%6.5%0.0%
April 202618483.7%8.7%0.0%
May 202618782.9%9.6%0.5%
June 202617774.6%13.0%0.6%

What drove SMF to ONT delay minutes?

Late aircraft was the largest recorded SMF-to-ONT delay category, accounting for 67.5% of 16,697 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.9%
Late aircraft67.5%
National airspace4.5%
Weather0.2%
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.