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

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

Historically, 82.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 4,416 flights.

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

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 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%

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
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%

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
SkyWest Airlines1,95287.0%7.3%0.3%
Alaska Airlines1,30979.8%9.1%0.6%
Southwest Airlines1,15577.2%12.1%0.2%

Monthly trend

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

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 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.

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.