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Flight Reliability

DL 933 · Delta Air Lines

Atlanta → San Jose (ATL–SJC)88% of its flights flew this route. The rest (MSY–LAX, ATL–SLC) are included in these numbers.

87
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
0 min
Average arrival delay
1.2%
Cancelled
6 min early
Median arrival delay

Based on 333 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

DL 933 arrived on time 93% of the time on Thursdays and just 77% on Fridays. That gap is worth planning around.

A bit ahead of the Delta Air Lines network.

DL 933 arrived on time 85% of the time, versus 81% across the Delta Air Lines network.

Recent months have been rougher.

DL 933 arrived on time 80% of the time over the last three months in the data, compared with 93% in the three months before that.

The breakdown

On-time by weekday
  • Mon81%(48 flights)
  • Tue81%(48 flights)
  • Wed85%(46 flights)
  • Thu93%(44 flights)
  • Fri77%(47 flights)
  • Sat90%(48 flights)
  • Sun87%(47 flights)
On-time by departure window
  • 9 AM–12 PM—(4 flights)
  • 3–6 PM83%(35 flights)
  • 6–9 PM85%(289 flights)
On-time trend by month
81%
May

Jun 66% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%29
July 202573%30
August 202581%31
September 2025100%30
October 202590%31
November 202596%24
December 202596%27
January 202682%27
February 2026100%14
March 202671%24
April 202690%30
May 202681%31
Departures on time
84%
Diverted
0.3%
Flights flown
328
Months covered
12

Same route, other flights

Keep nerding

Based on 333 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.