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

Boston, MA (BOS) to Salt Lake City, UT (SLC) flight delay odds

74.0% of 1,256 official scheduled BOS-to-SLC flights arrived on time; 14.7% arrived at least 30 minutes late and 1.5% 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
74.0%arrived on time
14.7%30+ min late
1.5%cancelled
1,256scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.1%all scheduled flights
120+ minutes late3.5%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+9.0 mincompleted flights

Which departure time was most reliable for BOS to SLC?

Among qualifying BOS-to-SLC departure window results, Early morning had the highest on-time rate: 83.6% of 391 flights. Evening was lowest at 65.2% across 485 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning39183.6%6.4%2.0%
Late morning33975.5%14.5%0.9%
Afternoon4175.6%22.0%0.0%
Evening48565.2%21.0%1.6%

Which weekday was most reliable for BOS to SLC?

Among qualifying BOS-to-SLC weekday results, Monday had the highest on-time rate: 79.9% of 184 flights. Sunday was lowest at 65.8% across 184 flights.

DayFlightsOn time30+ minCancelled
Monday18479.9%8.7%4.3%
Tuesday16875.0%14.3%2.4%
Wednesday16177.0%13.0%1.2%
Thursday17971.5%16.2%0.6%
Friday18179.6%12.2%1.1%
Saturday19970.4%18.1%0.0%
Sunday18465.8%20.1%1.1%

Which airline was most reliable for BOS to SLC?

Among qualifying BOS-to-SLC airline results, Delta Air Lines had the highest on-time rate: 76.6% of 1,083 flights. JetBlue Airways was lowest at 57.8% across 173 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines1,08376.6%13.0%1.2%
JetBlue Airways17357.8%25.4%3.5%

Which month was most reliable for BOS to SLC?

Among qualifying BOS-to-SLC month results, September 2025 had the highest on-time rate: 88.0% of 92 flights. February 2026 was lowest at 62.7% across 110 flights.

MonthFlightsOn time30+ minCancelled
July 202512374.0%20.3%1.6%
August 202511682.8%10.3%0.0%
September 20259288.0%8.7%0.0%
October 20259279.3%13.0%0.0%
November 20259782.5%11.3%0.0%
December 202510764.5%18.7%1.9%
January 20269264.1%13.0%7.6%
February 202611062.7%22.7%6.4%
March 202613272.7%13.6%0.0%
April 20269283.7%8.7%0.0%
May 20269367.7%15.1%1.1%
June 202611069.1%18.2%0.0%

What drove BOS to SLC delay minutes?

Airline was the largest recorded BOS-to-SLC delay category, accounting for 43.6% of 19,667 BTS-attributed delay minutes during July 2025–June 2026.

Airline43.6%
Late aircraft25.1%
National airspace30.0%
Weather1.3%
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.