Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 387 · Delta Air Lines

Atlanta → Salt Lake City (ATL–SLC)

95
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
5 min early
Average arrival delay
0.5%
Cancelled
9 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Mondays have been rough.

DL 387 arrived on time 98% of the time on Fridays and just 81% on Mondays. That gap is worth planning around.

Better than the ATL–SLC route average.

DL 387 arrived on time 92% of the time, versus 83% across the ATL–SLC route.

Better than the Delta Air Lines network average.

DL 387 arrived on time 92% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon81%(52 flights)
  • Tue94%(52 flights)
  • Wed94%(51 flights)
  • Thu92%(51 flights)
  • Fri98%(52 flights)
  • Sat90%(51 flights)
  • Sun92%(51 flights)
On-time trend by month
97%
May

Jun 93% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202590%31
August 202593%30
September 2025100%30
October 202590%30
November 202593%30
December 202584%31
January 202686%29
February 202696%27
March 202687%31
April 202690%30
May 202697%31
Departures on time
87%
Diverted
0.8%
Flights flown
360
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.