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Flight Reliability

DL 1272 · Delta Air Lines

Salt Lake City → San Jose (SLC–SJC)

86
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
9 min
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 Monday if you can.

DL 1272 arrived on time 90% of the time on Wednesdays. On Mondays: 77%.

A bit behind the SLC–SJC route.

DL 1272 arrived on time 83% of the time, versus 87% across the SLC–SJC route.

The breakdown

On-time by weekday
  • Mon77%(51 flights)
  • Tue85%(52 flights)
  • Wed90%(52 flights)
  • Thu82%(51 flights)
  • Fri85%(52 flights)
  • Sat80%(51 flights)
  • Sun79%(52 flights)
On-time by departure window
  • 3–6 PM—(1 flights)
  • 6–9 PM81%(42 flights)
  • 9 PM–12 AM83%(318 flights)
On-time trend by month
81%
May

Jun 83% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202574%31
August 202571%31
September 202577%30
October 202594%31
November 202579%29
December 202573%30
January 202693%30
February 202693%28
March 202687%30
April 202687%30
May 202681%31
Departures on time
83%
Diverted
0%
Flights flown
361
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.