BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
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Sacramento, CA (SMF) to Ontario, CA (ONT) flight delay odds

Historically, 84.4% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,111 flights.

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

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 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%

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
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%

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
Southwest Airlines2,11184.4%8.9%0.2%

Monthly trend

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

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 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.

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.