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Flight Reliability

DL 712 · Delta Air Lines

Atlanta → San Diego (ATL–SAN)99% of its flights flew this route. The rest (SAN–ATL) are included in these numbers.

79
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
6 min
Average arrival delay
0.3%
Cancelled
4 min early
Median arrival delay

Based on 299 historical flights. Data through May 2026.

What the data says

3–6 PM has a slight edge.

Departures between 3–6 PM arrived on time 77% of the time, against 73% between 6–9 PM.

Thursdays have been rough.

DL 712 arrived on time 84% of the time on Wednesdays and just 67% on Thursdays. That gap is worth planning around.

A bit behind the ATL–SAN route.

DL 712 arrived on time 75% of the time, versus 78% across the ATL–SAN route.

A bit behind the Delta Air Lines network.

DL 712 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon79%(48 flights)
  • Tue76%(38 flights)
  • Wed84%(37 flights)
  • Thu67%(43 flights)
  • Fri73%(44 flights)
  • Sat79%(38 flights)
  • Sun71%(48 flights)
On-time by departure window
  • 3–6 PM77%(135 flights)
  • 6–9 PM73%(157 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
55%
May

Jun 73% → May 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%15
July 202558%26
August 202569%29
September 202579%24
October 202594%18
November 202581%21
December 202562%13
January 202673%30
February 202689%28
March 202687%31
April 202683%30
May 202655%31
Departures on time
76%
Diverted
0.7%
Flights flown
296
Months covered
12

Same route, other flights

Keep nerding

Based on 299 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.