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Flight Reliability

DL 1232 · Delta Air Lines

Atlanta → Detroit (ATL–DTW)

63
A Little Dicey
WanderNerd Reliability Score
65%
Arrive within 15 minutes
21 min
Average arrival delay
1.1%
Cancelled
7 min
Median arrival delay

Based on 268 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 1232 departing between 6–9 PM arrived on time 69% of the time, versus 60% between 9 PM–12 AM.

Friday is doing you no favors.

DL 1232 arrived on time 84% of the time on Tuesdays and just 55% on Fridays. That gap is worth planning around.

Lagging the ATL–DTW route.

DL 1232 arrived on time 65% of the time, versus 78% across the ATL–DTW route.

Well behind the Delta Air Lines network.

DL 1232 arrived on time 65% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon66%(47 flights)
  • Tue84%(31 flights)
  • Wed65%(31 flights)
  • Thu69%(48 flights)
  • Fri55%(47 flights)
  • Sat62%(13 flights)
  • Sun56%(48 flights)
On-time by departure window
  • 6–9 PM69%(127 flights)
  • 9 PM–12 AM60%(138 flights)
On-time trend by month
50%
May

Jun 46% → May 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%22
July 202545%20
August 202557%14
September 202583%12
October 202556%16
November 202570%20
December 202585%26
January 202672%25
February 202682%27
March 202644%27
April 202685%26
May 202650%30
Departures on time
59%
Diverted
0%
Flights flown
265
Months covered
12

Same route, other flights

Keep nerding

Based on 268 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.