Skip to content
WanderNerd
Check a flight

Route Reliability

Grand Rapids → Denver

GRR–DEN · 1,015 miles · Gerald R. Ford International Airport to Denver International Airport

86
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
6 min
Average arrival delay
0.3%
Cancelled
1,242
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.Southwest Airlines83%367 flights
  2. 2.United Airlines80%729 flights
  3. 3.Frontier Airlines73%146 flights

What the data says

The 12–3 PM departure wins.

GRR–DEN flights departing between 12–3 PM arrived on time 94% of the time, versus 70% between 6–9 PM.

Tuesday has been the better bet.

A small edge: 84% on time on Tuesdays against 78% on Mondays.

Southwest Airlines runs this route best.

Southwest Airlines arrived on time 83% of the time on this route; Frontier Airlines managed 73%.

It basically never cancels.

Out of 1,242 scheduled flights, only 0.3% were cancelled.

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%(183 flights)
  • Tue84%(153 flights)
  • Wed81%(166 flights)
  • Thu82%(164 flights)
  • Fri80%(185 flights)
  • Sat80%(187 flights)
  • Sun80%(197 flights)
On-time by departure window
  • 3–6 AM88%(48 flights)
  • 6–9 AM89%(297 flights)
  • 9 AM–12 PM80%(239 flights)
  • 12–3 PM94%(46 flights)
  • 3–6 PM77%(444 flights)
  • 6–9 PM70%(156 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
78%
May

Jun 81% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%118
July 202583%119
August 202583%120
September 202588%114
October 202591%111
November 202588%102
December 202568%102
January 202658%96
February 202677%83
March 202679%70
April 202684%95
May 202678%105

Keep nerding

Based on 1,242 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.