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Flight Reliability

DL 1200 · Delta Air Lines

Rochester → Atlanta (ROC–ATL)

76
Usually Fine
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min
Average arrival delay
4.4%
Cancelled
10 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Wednesday is the weak spot.

DL 1200 arrived on time 94% of the time on Tuesdays. On Wednesdays: 82%.

A bit ahead of the ROC–ATL route.

DL 1200 arrived on time 87% of the time, versus 81% across the ROC–ATL route.

A bit ahead of the Delta Air Lines network.

DL 1200 arrived on time 87% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 1200 was cancelled 4.4% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon86%(49 flights)
  • Tue94%(51 flights)
  • Wed82%(51 flights)
  • Thu84%(51 flights)
  • Fri94%(50 flights)
  • Sat85%(47 flights)
  • Sun84%(49 flights)
On-time trend by month
87%
May

Jun 100% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%27
July 202593%27
August 202593%30
September 202593%30
October 202597%31
November 202586%28
December 202553%30
January 202679%29
February 202679%28
March 202689%28
April 202697%29
May 202687%31
Departures on time
89%
Diverted
0.3%
Flights flown
348
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.