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

Sacramento, CA (SMF) to Seattle, WA (SEA) flight delay odds

82.3% of 4,416 official scheduled SMF-to-SEA flights arrived on time; 9.1% arrived at least 30 minutes late and 0.3% 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
82.3%arrived on time
9.1%30+ min late
0.3%cancelled
4,416scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.7%all scheduled flights
120+ minutes late1.0%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-0.4 mincompleted flights

Which departure time was most reliable for SMF to SEA?

Among qualifying SMF-to-SEA departure window results, Early morning had the highest on-time rate: 87.2% of 1,278 flights. Night was lowest at 71.0% across 107 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,27887.2%5.9%0.4%
Late morning65386.1%6.9%0.3%
Afternoon1,12682.2%9.0%0.4%
Evening1,25276.4%12.9%0.2%
Night10771.0%17.8%0.9%

Which weekday was most reliable for SMF to SEA?

Among qualifying SMF-to-SEA weekday results, Tuesday had the highest on-time rate: 86.3% of 621 flights. Thursday was lowest at 79.3% across 673 flights.

DayFlightsOn time30+ minCancelled
Monday68282.4%8.5%0.3%
Tuesday62186.3%6.6%0.3%
Wednesday60385.2%8.5%0.0%
Thursday67379.3%11.6%0.0%
Friday67279.9%10.9%1.0%
Saturday51583.9%8.2%0.4%
Sunday65080.0%8.9%0.3%

Which airline was most reliable for SMF to SEA?

Among qualifying SMF-to-SEA airline results, SkyWest Airlines had the highest on-time rate: 87.0% of 1,952 flights. Southwest Airlines was lowest at 77.2% across 1,155 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,95287.0%7.3%0.3%
Alaska Airlines1,30979.8%9.1%0.6%
Southwest Airlines1,15577.2%12.1%0.2%

Which month was most reliable for SMF to SEA?

Among qualifying SMF-to-SEA month results, February 2026 had the highest on-time rate: 90.1% of 282 flights. August 2025 was lowest at 76.8% across 426 flights.

MonthFlightsOn time30+ minCancelled
July 202545580.4%12.1%0.4%
August 202542676.8%12.0%0.5%
September 202539879.1%11.3%0.0%
October 202539580.5%10.6%0.8%
November 202534184.5%6.5%0.3%
December 202529578.0%10.8%0.0%
January 202630987.7%4.9%0.6%
February 202628290.1%4.6%0.0%
March 202635085.7%7.7%1.4%
April 202636985.6%7.9%0.0%
May 202638985.6%6.4%0.0%
June 202640777.9%11.1%0.0%

What drove SMF to SEA delay minutes?

Airline was the largest recorded SMF-to-SEA delay category, accounting for 39.1% of 35,771 BTS-attributed delay minutes during July 2025–June 2026.

Airline39.1%
Late aircraft28.8%
National airspace24.0%
Weather7.6%
Security0.4%
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.