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

Salt Lake City, UT (SLC) to Boise, ID (BOI) flight delay odds

Historically, 86.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,742 flights.

HISTORICAL ROUTE SIGNALLower disruption
86.3%arrived on time
7.5%30+ min late
0.8%cancelled
1,742scheduled 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 late1.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival-1.4 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 morning29788.9%5.7%1.7%
Late morning42384.2%7.1%0.7%
Afternoon36590.4%6.0%0.3%
Evening25788.7%6.6%0.0%
Night40081.5%11.2%1.2%

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
Monday25085.2%6.0%0.8%
Tuesday25490.9%5.1%0.4%
Wednesday24687.4%8.9%0.0%
Thursday24484.0%9.4%0.8%
Friday24883.9%7.3%1.2%
Saturday24988.4%7.2%0.8%
Sunday25184.5%8.8%1.6%

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
Delta Air Lines1,22383.8%9.0%1.1%
SkyWest Airlines51992.3%4.0%0.2%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202515086.0%8.7%0.0%
August 202515586.5%9.0%0.0%
September 202515087.3%5.3%0.0%
October 202515589.0%6.5%0.0%
November 202514785.7%7.5%3.4%
December 202514981.2%9.4%2.0%
January 202612481.5%6.5%1.6%
February 202611288.4%8.9%0.0%
March 202614888.5%8.1%0.0%
April 202615084.0%8.7%0.7%
May 202615588.4%5.2%0.0%
June 202614789.1%6.8%2.0%

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.

Airline66.0%
Late aircraft18.7%
National airspace7.6%
Weather7.7%
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.