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

San Jose, CA (SJC) to Boise, ID (BOI) flight delay odds

84.9% of 676 official scheduled SJC-to-BOI flights arrived on time; 9.3% arrived at least 30 minutes late and 0.1% 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
84.9%arrived on time
9.3%30+ min late
0.1%cancelled
676scheduled 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 late1.3%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-2.1 mincompleted flights

Which departure time was most reliable for SJC to BOI?

Among qualifying SJC-to-BOI departure window results, Late morning had the highest on-time rate: 94.0% of 184 flights. Afternoon was lowest at 66.0% across 159 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning18494.0%3.8%0.0%
Afternoon15966.0%18.9%0.0%
Evening30988.3%8.4%0.3%

Which weekday was most reliable for SJC to BOI?

Among qualifying SJC-to-BOI weekday results, Tuesday had the highest on-time rate: 94.5% of 91 flights. Thursday was lowest at 78.1% across 105 flights.

DayFlightsOn time30+ minCancelled
Monday10783.2%14.0%0.0%
Tuesday9194.5%5.5%0.0%
Wednesday8893.2%1.1%0.0%
Thursday10578.1%11.4%1.0%
Friday10779.4%13.1%0.0%
Saturday6182.0%4.9%0.0%
Sunday11785.5%11.1%0.0%

Which airline was most reliable for SJC to BOI?

Among qualifying SJC-to-BOI airline results, SkyWest Airlines had the highest on-time rate: 87.0% of 346 flights. Southwest Airlines was lowest at 82.7% across 330 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines34687.0%8.1%0.3%
Southwest Airlines33082.7%10.6%0.0%

Which month was most reliable for SJC to BOI?

Among qualifying SJC-to-BOI month results, February 2026 had the highest on-time rate: 95.8% of 48 flights. May 2026 was lowest at 59.6% across 47 flights.

MonthFlightsOn time30+ minCancelled
July 20256293.5%4.8%0.0%
August 20256293.5%4.8%0.0%
September 20256086.7%3.3%0.0%
October 20255485.2%7.4%0.0%
November 20256288.7%8.1%1.6%
December 20257185.9%11.3%0.0%
January 20266095.0%3.3%0.0%
February 20264895.8%2.1%0.0%
March 20264490.9%6.8%0.0%
April 20264774.5%17.0%0.0%
May 20264759.6%23.4%0.0%
June 20265964.4%22.0%0.0%

What drove SJC to BOI delay minutes?

Late aircraft was the largest recorded SJC-to-BOI delay category, accounting for 70.0% of 5,075 BTS-attributed delay minutes during July 2025–June 2026.

Airline16.4%
Late aircraft70.0%
National airspace10.3%
Weather3.3%
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.