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

Boise, ID (BOI) to San Francisco, CA (SFO) flight delay odds

70.5% of 1,684 official scheduled BOI-to-SFO flights arrived on time; 19.9% arrived at least 30 minutes late and 0.5% 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
70.5%arrived on time
19.9%30+ min late
0.5%cancelled
1,684scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.3%all scheduled flights
120+ minutes late4.8%all scheduled flights
Diverted0.6%did not reach as scheduled
Average arrival+15.5 mincompleted flights

Which departure time was most reliable for BOI to SFO?

Among qualifying BOI-to-SFO departure window results, Early morning had the highest on-time rate: 80.2% of 570 flights. Late morning was lowest at 61.4% across 365 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning57080.2%12.6%0.5%
Late morning36561.4%24.9%0.0%
Afternoon40671.4%19.0%0.7%
Evening34363.0%27.7%0.6%

Which weekday was most reliable for BOI to SFO?

Among qualifying BOI-to-SFO weekday results, Saturday had the highest on-time rate: 81.5% of 227 flights. Monday was lowest at 64.9% across 251 flights.

DayFlightsOn time30+ minCancelled
Monday25164.9%21.9%0.4%
Tuesday22975.5%14.8%0.9%
Wednesday24569.0%22.0%0.4%
Thursday24567.3%23.3%0.0%
Friday24968.3%23.3%0.4%
Saturday22781.5%10.1%0.9%
Sunday23868.1%22.7%0.4%

Which airline was most reliable for BOI to SFO?

Among qualifying BOI-to-SFO airline results, United Airlines had the highest on-time rate: 71.4% of 231 flights. SkyWest Airlines was lowest at 70.3% across 1,453 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,45370.3%19.8%0.4%
United Airlines23171.4%20.8%0.9%

Which month was most reliable for BOI to SFO?

Among qualifying BOI-to-SFO month results, August 2025 had the highest on-time rate: 87.9% of 116 flights. June 2026 was lowest at 40.2% across 132 flights.

MonthFlightsOn time30+ minCancelled
July 202511973.9%18.5%0.0%
August 202511687.9%6.0%0.9%
September 202511376.1%10.6%0.0%
October 202513079.2%12.3%0.0%
November 202514876.4%16.9%1.4%
December 202515371.2%19.0%0.7%
January 202615180.1%13.2%1.3%
February 202613272.0%17.4%0.0%
March 202617881.5%11.8%0.0%
April 202616664.5%23.5%1.2%
May 202614644.5%44.5%0.0%
June 202613240.2%42.4%0.0%

What drove BOI to SFO delay minutes?

National airspace was the largest recorded BOI-to-SFO delay category, accounting for 46.6% of 39,339 BTS-attributed delay minutes during July 2025–June 2026.

Airline32.3%
Late aircraft19.4%
National airspace46.6%
Weather1.7%
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.