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Flight Reliability

DL 1501 · Delta Air Lines

Atlanta → Columbus (ATL–CMH)92% of its flights flew this route. The rest (MIA–BOS) are included in these numbers.

71
Usually Fine
WanderNerd Reliability Score
72%
Arrive within 15 minutes
12 min
Average arrival delay
2.0%
Cancelled
1 min early
Median arrival delay

Based on 307 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

DL 1501 departing between 6–9 AM arrived on time 86% of the time, versus 53% between 9 PM–12 AM.

Sunday scaries are real for this one.

DL 1501 arrived on time 77% of the time on Saturdays. On Sundays: 63%.

Lagging the ATL–CMH route.

DL 1501 arrived on time 72% of the time, versus 80% across the ATL–CMH route.

Lagging the Delta Air Lines network.

DL 1501 arrived on time 72% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon77%(47 flights)
  • Tue71%(41 flights)
  • Wed76%(42 flights)
  • Thu73%(45 flights)
  • Fri68%(47 flights)
  • Sat77%(31 flights)
  • Sun63%(48 flights)
On-time by departure window
  • 6–9 AM86%(22 flights)
  • 6–9 PM74%(239 flights)
  • 9 PM–12 AM53%(40 flights)
On-time trend by month
82%
May

Jun 57% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%23
July 202554%26
August 202566%29
September 202573%30
October 202571%31
November 202583%24
December 202558%24
January 202657%14
February 202692%25
March 202670%27
April 202695%20
May 202682%28
Departures on time
73%
Diverted
0%
Flights flown
301
Months covered
12

Same route, other flights

Keep nerding

Based on 307 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.