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

San Antonio, TX (SAT) to Seattle, WA (SEA) flight delay odds

75.8% of 558 official scheduled SAT-to-SEA flights arrived on time; 12.2% arrived at least 30 minutes late and 1.4% 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
75.8%arrived on time
12.2%30+ min late
1.4%cancelled
558scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.1%all scheduled flights
120+ minutes late2.7%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+4.3 mincompleted flights

Which departure time was most reliable for SAT to SEA?

Among qualifying SAT-to-SEA departure window results, Early morning had the highest on-time rate: 83.3% of 240 flights. Evening was lowest at 69.8% across 298 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning24083.3%8.8%1.7%
Evening29869.8%14.4%1.3%

Which weekday was most reliable for SAT to SEA?

Among qualifying SAT-to-SEA weekday results, Saturday had the highest on-time rate: 80.3% of 71 flights. Monday was lowest at 73.3% across 86 flights.

DayFlightsOn time30+ minCancelled
Monday8673.3%15.1%3.5%
Tuesday7576.0%10.7%1.3%
Wednesday7178.9%7.0%0.0%
Thursday8575.3%9.4%2.4%
Friday8473.8%16.7%1.2%
Saturday7180.3%14.1%1.4%
Sunday8674.4%11.6%0.0%

Which airline was most reliable for SAT to SEA?

Only Alaska Airlines met the SAT-to-SEA airline threshold: 75.8% of 558 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines55875.8%12.2%1.4%

Which month was most reliable for SAT to SEA?

Among qualifying SAT-to-SEA month results, September 2025 had the highest on-time rate: 93.6% of 47 flights. March 2026 was lowest at 54.8% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20256160.7%14.8%1.6%
August 20255770.2%15.8%1.8%
September 20254793.6%6.4%0.0%
October 20255474.1%13.0%3.7%
November 20255078.0%8.0%4.0%
December 20255263.5%21.2%0.0%
January 20263871.1%15.8%2.6%
February 20262889.3%3.6%0.0%
March 20263154.8%22.6%0.0%
April 20263090.0%3.3%3.3%
May 20265092.0%4.0%0.0%
June 20266080.0%13.3%0.0%

What drove SAT to SEA delay minutes?

Late aircraft was the largest recorded SAT-to-SEA delay category, accounting for 43.8% of 7,055 BTS-attributed delay minutes during July 2025–June 2026.

Airline35.4%
Late aircraft43.8%
National airspace16.3%
Weather4.3%
Security0.2%
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.