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Route Reliability

Missoula → Salt Lake City

MSO–SLC · 436 miles · Missoula Montana Airport to Salt Lake City International Airport

95
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
2 min early
Average arrival delay
0.9%
Cancelled
1,059
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 1,059 flights. No comparison to make.

What the data says

Departure time hasn't mattered much.

On-time rates stay between 90% and 92% across the day.

Wednesday is the weak spot.

MSO–SLC flights arrived on time 94% of the time on Mondays. On Wednesdays: 87%.

Slipping a little lately.

MSO–SLC flights arrived on time 87% 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
  • Mon94%(156 flights)
  • Tue91%(154 flights)
  • Wed87%(148 flights)
  • Thu89%(149 flights)
  • Fri90%(149 flights)
  • Sat92%(141 flights)
  • Sun92%(151 flights)
On-time by departure window
  • 3–6 AM90%(359 flights)
  • 12–3 PM92%(348 flights)
  • 3–6 PM—(2 flights)
  • 6–9 PM91%(339 flights)
On-time trend by month
93%
May

Jun 92% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%90
July 202588%92
August 202590%93
September 202599%74
October 202595%92
November 202593%82
December 202592%88
January 202691%87
February 202690%78
March 202684%90
April 202685%89
May 202693%93

Keep nerding

Based on 1,059 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.