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Route Reliability

Salt Lake City → Denver

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

82
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
7 min
Average arrival delay
0.6%
Cancelled
7,763
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines81%2,731 flights
  2. 2.Delta Air Lines78%1,690 flights
  3. 3.Frontier Airlines78%996 flights
  4. 4.Southwest Airlines73%2,346 flights

What the data says

Morning flights do better here.

SLC–DEN flights departing between 3–6 AM arrived on time 95% of the time, versus 67% between 3–6 PM.

Friday is doing you no favors.

SLC–DEN flights arrived on time 84% of the time on Saturdays. On Fridays: 73%.

United Airlines runs this route best.

United Airlines arrived on time 81% 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
  • Mon78%(1161 flights)
  • Tue78%(1069 flights)
  • Wed76%(1093 flights)
  • Thu77%(1139 flights)
  • Fri73%(1153 flights)
  • Sat84%(934 flights)
  • Sun79%(1146 flights)
On-time by departure window
  • 3–6 AM95%(472 flights)
  • 6–9 AM82%(1828 flights)
  • 9 AM–12 PM81%(1302 flights)
  • 12–3 PM77%(1614 flights)
  • 3–6 PM67%(1041 flights)
  • 6–9 PM67%(1148 flights)
  • 9 PM–12 AM83%(290 flights)
On-time trend by month
80%
May

Jun 67% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%656
July 202564%677
August 202572%662
September 202581%641
October 202580%662
November 202585%575
December 202577%616
January 202681%632
February 202683%609
March 202681%667
April 202681%640
May 202680%658

Keep nerding

Based on 7,763 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.