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Flight Reliability

DL 729 · Delta Air Lines

San Diego → Atlanta (SAN–ATL)

95
Nerd Approved
WanderNerd Reliability Score
93%
Arrive within 15 minutes
3 min early
Average arrival delay
1.1%
Cancelled
6 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Saturday if you can.

DL 729 arrived on time 96% of the time on Sundays. On Saturdays: 88%.

Better than the SAN–ATL route average.

DL 729 arrived on time 93% of the time, versus 85% across the SAN–ATL route.

Better than the Delta Air Lines network average.

DL 729 arrived on time 93% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon96%(51 flights)
  • Tue96%(50 flights)
  • Wed92%(52 flights)
  • Thu90%(52 flights)
  • Fri94%(51 flights)
  • Sat88%(51 flights)
  • Sun96%(52 flights)
On-time trend by month
94%
May

Jun 87% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 2025100%30
August 202590%29
September 2025100%30
October 2025100%31
November 202597%29
December 202597%31
January 202687%31
February 202689%28
March 202683%29
April 202697%30
May 202694%31
Departures on time
97%
Diverted
0.5%
Flights flown
359
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.