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Route Reliability

Denver → Salt Lake City

DEN–SLC · 391 miles · Denver International Airport to Salt Lake City International Airport

84
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
8 min
Average arrival delay
0.5%
Cancelled
7,765
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Delta Air Lines82%1,690 flights
  2. 2.Frontier Airlines81%995 flights
  3. 3.United Airlines79%2,733 flights
  4. 4.Southwest Airlines73%2,347 flights

What the data says

Morning flights do better here.

DEN–SLC flights departing between 6–9 AM arrived on time 90% of the time, versus 65% between 9 PM–12 AM.

Sunday scaries are real for this one.

DEN–SLC flights arrived on time 83% of the time on Saturdays. On Sundays: 75%.

Delta Air Lines runs this route best.

Delta Air Lines arrived on time 82% of the time on this route; Southwest Airlines managed 73%.

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
  • Mon77%(1167 flights)
  • Tue81%(1082 flights)
  • Wed79%(1089 flights)
  • Thu77%(1145 flights)
  • Fri76%(1151 flights)
  • Sat83%(975 flights)
  • Sun75%(1109 flights)
On-time by departure window
  • 12–3 AM—(2 flights)
  • 3–6 AM88%(254 flights)
  • 6–9 AM90%(1355 flights)
  • 9 AM–12 PM82%(1196 flights)
  • 12–3 PM81%(1236 flights)
  • 3–6 PM77%(1430 flights)
  • 6–9 PM67%(1523 flights)
  • 9 PM–12 AM65%(722 flights)
On-time trend by month
82%
May

Jun 66% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%662
July 202560%675
August 202574%664
September 202583%644
October 202582%660
November 202584%577
December 202573%626
January 202685%634
February 202685%609
March 202681%665
April 202682%638
May 202682%664

Keep nerding

Based on 7,765 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.