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

Seattle, WA (SEA) to San Jose, CA (SJC) flight delay odds

80.9% of 4,371 official scheduled SEA-to-SJC flights arrived on time; 10.4% arrived at least 30 minutes late and 0.8% 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
80.9%arrived on time
10.4%30+ min late
0.8%cancelled
4,371scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.3%all scheduled flights
120+ minutes late0.9%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+1.6 mincompleted flights

Which departure time was most reliable for SEA to SJC?

Among qualifying SEA-to-SJC departure window results, Early morning had the highest on-time rate: 90.9% of 890 flights. Night was lowest at 65.6% across 64 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning89090.9%4.0%1.3%
Late morning88780.9%9.4%0.7%
Afternoon1,33481.0%10.4%0.6%
Evening1,19674.2%15.6%0.7%
Night6465.6%17.2%1.6%

Which weekday was most reliable for SEA to SJC?

Among qualifying SEA-to-SJC weekday results, Wednesday had the highest on-time rate: 86.7% of 618 flights. Friday was lowest at 75.6% across 651 flights.

DayFlightsOn time30+ minCancelled
Monday66878.4%12.6%0.7%
Tuesday63685.5%6.6%0.6%
Wednesday61886.7%7.4%0.8%
Thursday66379.9%10.3%0.9%
Friday65175.6%13.7%1.4%
Saturday50783.4%9.1%0.6%
Sunday62877.5%12.9%0.5%

Which airline was most reliable for SEA to SJC?

Among qualifying SEA-to-SJC airline results, SkyWest Airlines had the highest on-time rate: 87.8% of 1,562 flights. Southwest Airlines was lowest at 72.4% across 927 flights.

AirlineFlightsOn time30+ minCancelled
Alaska Airlines1,87779.3%10.5%1.5%
SkyWest Airlines1,56287.8%7.2%0.2%
Southwest Airlines92772.4%15.9%0.3%
American Airlines4100.0%0.0%0.0%
United Airlines1100.0%0.0%0.0%

Which month was most reliable for SEA to SJC?

Among qualifying SEA-to-SJC month results, April 2026 had the highest on-time rate: 89.2% of 305 flights. July 2025 was lowest at 70.6% across 425 flights.

MonthFlightsOn time30+ minCancelled
July 202542570.6%15.8%2.4%
August 202539578.2%12.9%0.8%
September 202536783.1%9.8%0.0%
October 202539283.7%8.9%1.0%
November 202537484.5%6.4%0.5%
December 202535377.1%11.3%0.8%
January 202633182.2%10.6%1.2%
February 202634284.5%7.3%0.0%
March 202633079.1%12.4%2.1%
April 202630589.2%5.2%0.0%
May 202635586.2%8.2%0.3%
June 202640276.1%14.2%0.2%

What drove SEA to SJC delay minutes?

Airline was the largest recorded SEA-to-SJC delay category, accounting for 40.8% of 38,633 BTS-attributed delay minutes during July 2025–June 2026.

Airline40.8%
Late aircraft39.1%
National airspace10.5%
Weather8.8%
Security0.8%
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.