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Flight Reliability

DL 4263 · Delta Air Lines

Salt Lake City → SGU (SLC–SGU)

96
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
0 min
Average arrival delay
0%
Cancelled
12 min early
Median arrival delay

Based on 288 historical flights. Data through May 2026.

What the data says

Thursday is the weak spot.

DL 4263 arrived on time 93% of the time on Tuesdays. On Thursdays: 81%.

A bit behind the SLC–SGU route.

DL 4263 arrived on time 88% of the time, versus 93% across the SLC–SGU route.

A bit ahead of the Delta Air Lines network.

DL 4263 arrived on time 88% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 288 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon88%(41 flights)
  • Tue93%(41 flights)
  • Wed93%(41 flights)
  • Thu81%(41 flights)
  • Fri90%(41 flights)
  • Sat88%(41 flights)
  • Sun83%(42 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM88%(287 flights)
On-time trend by month
74%
May

Jun 93% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202590%31
August 202590%31
September 202593%30
October 202584%31
November 202587%30
February 202675%12
March 202697%31
April 202687%30
May 202674%31
Departures on time
85%
Diverted
0%
Flights flown
288
Months covered
11

Same route, other flights

Keep nerding

Based on 288 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.