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

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

90.9% of 1,740 official scheduled BOI-to-SLC flights arrived on time; 4.7% arrived at least 30 minutes late and 1.0% 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
90.9%arrived on time
4.7%30+ min late
1.0%cancelled
1,740scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late2.6%all scheduled flights
120+ minutes late1.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival-5.0 mincompleted flights

Which departure time was most reliable for BOI to SLC?

Among qualifying BOI-to-SLC departure window results, Early morning had the highest on-time rate: 92.5% of 655 flights. Afternoon was lowest at 88.1% across 362 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning65592.5%3.1%0.9%
Late morning35991.4%5.3%1.4%
Afternoon36288.1%6.6%1.1%
Evening36490.4%5.2%0.5%

Which weekday was most reliable for BOI to SLC?

Among qualifying BOI-to-SLC weekday results, Tuesday had the highest on-time rate: 92.1% of 254 flights. Thursday was lowest at 88.5% across 244 flights.

DayFlightsOn time30+ minCancelled
Monday25089.6%5.6%2.0%
Tuesday25492.1%4.7%0.4%
Wednesday24691.1%5.3%0.0%
Thursday24488.5%6.6%0.4%
Friday24891.5%4.0%1.6%
Saturday24891.9%2.8%1.2%
Sunday25091.6%4.0%1.2%

Which airline was most reliable for BOI to SLC?

Among qualifying BOI-to-SLC airline results, SkyWest Airlines had the highest on-time rate: 95.0% of 517 flights. Delta Air Lines was lowest at 89.2% across 1,223 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines1,22389.2%5.7%1.3%
SkyWest Airlines51795.0%2.3%0.2%

Which month was most reliable for BOI to SLC?

Among qualifying BOI-to-SLC month results, May 2026 had the highest on-time rate: 96.1% of 155 flights. January 2026 was lowest at 83.1% across 124 flights.

MonthFlightsOn time30+ minCancelled
July 202514996.0%2.7%0.0%
August 202515591.0%5.8%0.0%
September 202515091.3%4.7%0.0%
October 202515592.3%5.2%0.0%
November 202514790.5%4.1%4.1%
December 202514987.2%6.7%2.7%
January 202612483.1%7.3%1.6%
February 202611289.3%5.4%0.0%
March 202614794.6%4.1%0.0%
April 202615089.3%3.3%0.7%
May 202615596.1%3.9%0.0%
June 202614788.4%4.1%2.7%

What drove BOI to SLC delay minutes?

Airline was the largest recorded BOI-to-SLC delay category, accounting for 57.1% of 11,677 BTS-attributed delay minutes during July 2025–June 2026.

Airline57.1%
Late aircraft28.1%
National airspace9.7%
Weather5.1%
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.