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

San Diego, CA (SAN) to Boise, ID (BOI) flight delay odds

Historically, 78.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,042 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
78.3%arrived on time
14.2%30+ min late
0.4%cancelled
1,042scheduled 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 late1.6%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+3.3 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 morning17589.1%4.6%0.0%
Late morning21785.3%11.5%0.5%
Afternoon22166.5%20.4%0.0%
Evening41377.5%15.3%0.7%

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
Monday16276.5%16.7%0.0%
Tuesday14388.8%7.0%0.0%
Wednesday13981.3%8.6%0.7%
Thursday15968.6%20.8%1.9%
Friday15869.6%21.5%0.0%
Saturday13287.1%8.3%0.0%
Sunday14979.2%14.1%0.0%

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 Airlines40586.7%9.9%0.2%
Southwest Airlines37268.0%21.0%0.0%
Alaska Airlines26580.0%11.3%1.1%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20259174.7%14.3%0.0%
August 20258880.7%10.2%0.0%
September 20258688.4%4.7%1.2%
October 20259185.7%8.8%1.1%
November 20259078.9%10.0%1.1%
December 20259477.7%17.0%0.0%
January 20267375.3%15.1%1.4%
February 20267486.5%8.1%0.0%
March 20268980.9%14.6%0.0%
April 20267974.7%15.2%0.0%
May 202610169.3%26.7%0.0%
June 20268668.6%23.3%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.

Airline24.8%
Late aircraft59.2%
National airspace13.8%
Weather2.2%
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.