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Route Reliability

Spokane → Salt Lake City

GEG–SLC · 546 miles · Spokane International Airport to Salt Lake City International Airport

96
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
6 min early
Average arrival delay
0.6%
Cancelled
1,664
Flights in the data

Data through May 2026.

Delta Air Lines is the only airline in this data on this route, arriving on time 91% of the time across 1,664 flights. No comparison to make.

What the data says

Morning flights do better here.

GEG–SLC flights departing between 9 AM–12 PM arrived on time 97% of the time, versus 88% between 12–3 PM.

Thursday comes out ahead.

A small edge: 93% on time on Thursdays against 88% on Saturdays.

Ticking up lately.

GEG–SLC flights arrived on time 94% of the time over the last three months in the data, compared with 91% in the three months before that.

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
  • Mon90%(243 flights)
  • Tue92%(244 flights)
  • Wed92%(236 flights)
  • Thu93%(239 flights)
  • Fri90%(242 flights)
  • Sat88%(202 flights)
  • Sun91%(246 flights)
On-time by departure window
  • 3–6 AM91%(278 flights)
  • 6–9 AM95%(84 flights)
  • 9 AM–12 PM97%(345 flights)
  • 12–3 PM88%(362 flights)
  • 3–6 PM88%(342 flights)
  • 6–9 PM90%(241 flights)
On-time trend by month
96%
May

Jun 90% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%144
July 202588%146
August 202586%142
September 202591%137
October 202589%145
November 202592%134
December 202593%146
January 202687%118
February 202691%105
March 202691%140
April 202697%146
May 202696%149

Keep nerding

Based on 1,664 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.