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

St. Louis, MO (STL) to Sacramento, CA (SMF) flight delay odds

79.2% of 331 official scheduled STL-to-SMF flights arrived on time; 10.0% arrived at least 30 minutes late and 0.0% 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
79.2%arrived on time
10.0%30+ min late
0.0%cancelled
331scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.8%all scheduled flights
120+ minutes late0.9%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+6.0 mincompleted flights

Which departure time was most reliable for STL to SMF?

Among qualifying STL-to-SMF departure window results, Early morning had the highest on-time rate: 83.0% of 100 flights. Evening was lowest at 58.3% across 60 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning10083.0%5.0%0.0%
Afternoon14281.7%9.2%0.0%
Evening6058.3%23.3%0.0%

Which weekday was most reliable for STL to SMF?

Among qualifying STL-to-SMF weekday results, Tuesday had the highest on-time rate: 91.1% of 45 flights. Sunday was lowest at 68.0% across 50 flights.

DayFlightsOn time30+ minCancelled
Monday4973.5%16.3%0.0%
Tuesday4591.1%6.7%0.0%
Wednesday4379.1%4.7%0.0%
Thursday4885.4%6.2%0.0%
Friday4983.7%4.1%0.0%
Saturday4774.5%12.8%0.0%
Sunday5068.0%18.0%0.0%

Which airline was most reliable for STL to SMF?

Only Southwest Airlines met the STL-to-SMF airline threshold: 79.2% of 331 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines33179.2%10.0%0.0%

Which month was most reliable for STL to SMF?

Among qualifying STL-to-SMF month results, September 2025 had the highest on-time rate: 96.7% of 30 flights. October 2025 was lowest at 61.3% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253183.9%12.9%0.0%
August 20253187.1%3.2%0.0%
September 20253096.7%3.3%0.0%
October 20253161.3%25.8%0.0%
November 20252975.9%6.9%0.0%
December 20253164.5%19.4%0.0%
February 20261888.9%11.1%0.0%
March 20262979.3%10.3%0.0%
April 20263080.0%3.3%0.0%
May 20263187.1%3.2%0.0%
June 20263073.3%6.7%0.0%

What drove STL to SMF delay minutes?

Late aircraft was the largest recorded STL-to-SMF delay category, accounting for 51.3% of 3,046 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.0%
Late aircraft51.3%
National airspace10.2%
Weather5.5%
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.