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Flight Reliability

DL 1646 · Delta Air Lines

Atlanta → Detroit (ATL–DTW)

96
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
3 min early
Average arrival delay
0.8%
Cancelled
8 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

DL 1646 arrived on time 98% of the time on Wednesdays. On Fridays: 88%.

Better than the ATL–DTW route average.

DL 1646 arrived on time 92% of the time, versus 78% across the ATL–DTW route.

Better than the Delta Air Lines network average.

DL 1646 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon90%(52 flights)
  • Tue89%(52 flights)
  • Wed98%(51 flights)
  • Thu96%(52 flights)
  • Fri88%(50 flights)
  • Sat96%(51 flights)
  • Sun89%(52 flights)
On-time trend by month
94%
May

Jun 83% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202597%31
August 2025100%30
September 202593%30
October 2025100%30
November 202593%30
December 202577%31
January 2026100%29
February 202693%28
March 202687%31
April 202690%29
May 202694%31
Departures on time
90%
Diverted
0.3%
Flights flown
360
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.