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Flight Reliability

DL 2040 · Delta Air Lines

Salt Lake City → Miami (SLC–MIA)

93
Nerd Approved
WanderNerd Reliability Score
89%
Arrive within 15 minutes
2 min early
Average arrival delay
0.5%
Cancelled
8 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

DL 2040 arrived on time 100% of the time on Sundays and just 81% on Thursdays. That gap is worth planning around.

A bit ahead of the SLC–MIA route.

DL 2040 arrived on time 89% of the time, versus 85% across the SLC–MIA route.

Better than the Delta Air Lines network average.

DL 2040 arrived on time 89% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 2040 arrived on time 94% of the time over the last three months in the data, compared with 91% in the three months before that.

The breakdown

On-time by weekday
  • Mon84%(51 flights)
  • Tue90%(52 flights)
  • Wed92%(52 flights)
  • Thu81%(52 flights)
  • Fri82%(51 flights)
  • Sat90%(52 flights)
  • Sun100%(51 flights)
On-time trend by month
97%
May

Jun 76% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%29
July 202574%31
August 202590%31
September 202593%30
October 202577%30
November 202597%30
December 202587%31
January 202687%31
February 2026100%28
March 202693%29
April 202693%30
May 202697%31
Departures on time
88%
Diverted
0.3%
Flights flown
361
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.