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Flight Reliability

DL 654 · Delta Air Lines

San Jose → Atlanta (SJC–ATL)86% of its flights flew this route. The rest (ATL–SJC) are included in these numbers.

94
Nerd Approved
WanderNerd Reliability Score
93%
Arrive within 15 minutes
8 min early
Average arrival delay
1.4%
Cancelled
16 min early
Median arrival delay

Based on 421 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 6–9 AM arrived on time 93% of the time, against 88% between 6–9 PM.

Thursday comes out ahead.

A small edge: 95% on time on Thursdays against 88% on Tuesdays.

Better than the Delta Air Lines network average.

DL 654 arrived on time 93% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon93%(59 flights)
  • Tue88%(60 flights)
  • Wed95%(59 flights)
  • Thu95%(61 flights)
  • Fri92%(59 flights)
  • Sat93%(57 flights)
  • Sun92%(59 flights)
On-time by departure window
  • 6–9 AM93%(238 flights)
  • 6–9 PM88%(59 flights)
  • 9 PM–12 AM93%(117 flights)
On-time trend by month
90%
May

Jun 89% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%28
July 202590%31
August 202590%30
September 2025100%30
October 202597%31
November 2025100%29
December 202593%30
January 202685%27
February 202696%45
March 202684%61
April 2026100%42
May 202690%30
Departures on time
93%
Diverted
0.2%
Flights flown
414
Months covered
12

Same route, other flights

Keep nerding

Based on 421 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.