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Flight Reliability

DL 4046 · Delta Air Lines

PSC → Salt Lake City (PSC–SLC)99% of its flights flew this route. The rest (DTW–LEX, PVD–DTW) are included in these numbers.

97
Nerd Approved
WanderNerd Reliability Score
89%
Arrive within 15 minutes
1 min early
Average arrival delay
0%
Cancelled
9 min early
Median arrival delay

Based on 298 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 4046 arrived on time 94% of the time on Mondays. On Sundays: 84%.

A bit behind the PSC–SLC route.

DL 4046 arrived on time 89% of the time, versus 93% across the PSC–SLC route.

Better than the Delta Air Lines network average.

DL 4046 arrived on time 89% of the time, versus 81% across the Delta Air Lines network.

It basically never cancels.

Out of 298 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon94%(46 flights)
  • Tue91%(45 flights)
  • Wed87%(45 flights)
  • Thu86%(44 flights)
  • Fri93%(43 flights)
  • Sat90%(31 flights)
  • Sun84%(44 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 3–6 PM89%(296 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
93%
Apr

Jun 83% → Apr 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202583%30
August 202589%27
September 2025100%22
October 202587%30
November 2025100%28
December 202584%19
January 202696%23
February 202686%22
March 202680%30
April 202693%30
Departures on time
89%
Diverted
0%
Flights flown
298
Months covered
12

Same route, other flights

Keep nerding

Based on 298 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.