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Flight Reliability

DL 1236 · Delta Air Lines

Milwaukee → Atlanta (MKE–ATL)

90
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
2 min early
Average arrival delay
1.6%
Cancelled
15 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

DL 1236 arrived on time 94% of the time on Saturdays. On Mondays: 84%.

Better than the Delta Air Lines network average.

DL 1236 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 1236 arrived on time 90% of the time over the last three months in the data, compared with 80% in the three months before that.

The breakdown

On-time by weekday
  • Mon84%(50 flights)
  • Tue92%(52 flights)
  • Wed89%(52 flights)
  • Thu92%(52 flights)
  • Fri88%(51 flights)
  • Sat94%(50 flights)
  • Sun88%(51 flights)
On-time trend by month
94%
May

Jun 97% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%29
July 202597%31
August 202590%31
September 2025100%30
October 202597%31
November 202586%28
December 202581%31
January 202676%29
February 202682%28
March 202683%29
April 202693%30
May 202694%31
Departures on time
90%
Diverted
0.3%
Flights flown
358
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.