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Route Reliability

Salt Lake City → Boise

SLC–BOI · 290 miles · Salt Lake City International Airport to Boise Airport

92
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min early
Average arrival delay
0.7%
Cancelled
1,742
Flights in the data

Data through May 2026.

Delta Air Lines is the only airline in this data on this route, arriving on time 87% of the time across 1,742 flights. No comparison to make.

What the data says

The 3–6 PM departure wins.

SLC–BOI flights departing between 3–6 PM arrived on time 90% of the time, versus 83% between 9 PM–12 AM.

Friday is doing you no favors.

SLC–BOI flights arrived on time 91% of the time on Tuesdays. On Fridays: 83%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon87%(246 flights)
  • Tue91%(249 flights)
  • Wed87%(246 flights)
  • Thu85%(243 flights)
  • Fri83%(246 flights)
  • Sat90%(246 flights)
  • Sun87%(252 flights)
On-time by departure window
  • 6–9 AM90%(294 flights)
  • 9 AM–12 PM85%(420 flights)
  • 3–6 PM90%(389 flights)
  • 6–9 PM89%(225 flights)
  • 9 PM–12 AM83%(400 flights)
On-time trend by month
88%
May

Jun 86% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%145
July 202586%150
August 202587%155
September 202588%150
October 202590%155
November 202589%142
December 202583%145
January 202684%122
February 202688%112
March 202689%148
April 202685%149
May 202688%155

Keep nerding

Based on 1,742 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.