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Route Reliability

Atlanta → Denver

ATL–DEN · 1,199 miles · Hartsfield–Jackson Atlanta International Airport to Denver International Airport

79
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
1.1%
Cancelled
5,582
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines86%992 flights
  2. 2.Delta Air Lines77%2,803 flights
  3. 3.Southwest Airlines74%1,083 flights
  4. 4.Frontier Airlines69%704 flights

What the data says

Morning-you made the right choice.

ATL–DEN flights departing between 9 AM–12 PM arrived on time 87% of the time, versus 62% between 6–9 PM.

Sunday scaries are real for this one.

ATL–DEN flights arrived on time 83% of the time on Wednesdays. On Sundays: 73%.

United Airlines has a clear lead on this route.

United Airlines arrived on time 86% of the time on this route; Frontier Airlines managed 69%.

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
  • Mon75%(819 flights)
  • Tue77%(774 flights)
  • Wed83%(769 flights)
  • Thu78%(807 flights)
  • Fri78%(801 flights)
  • Sat75%(696 flights)
  • Sun73%(831 flights)
On-time by departure window
  • 6–9 AM87%(1064 flights)
  • 9 AM–12 PM87%(1050 flights)
  • 12–3 PM81%(1031 flights)
  • 3–6 PM69%(799 flights)
  • 6–9 PM62%(1094 flights)
  • 9 PM–12 AM72%(459 flights)
On-time trend by month
79%
May

Jun 62% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%501
July 202570%511
August 202573%488
September 202582%448
October 202579%473
November 202587%444
December 202569%449
January 202685%416
February 202681%408
March 202680%445
April 202682%438
May 202679%476

Keep nerding

Based on 5,582 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.