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Flight Reliability

DL 3021 · Delta Air Lines

Atlanta → Pensacola (ATL–PNS)

74
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
12 min
Average arrival delay
1.1%
Cancelled
3 min early
Median arrival delay

Based on 282 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 3021 departing between 9 PM–12 AM arrived on time 94% of the time, versus 68% between 6–9 PM.

Wednesdays have been rough.

DL 3021 arrived on time 80% of the time on Sundays and just 59% on Wednesdays. That gap is worth planning around.

Lagging the ATL–PNS route.

DL 3021 arrived on time 73% of the time, versus 83% across the ATL–PNS route.

Lagging the Delta Air Lines network.

DL 3021 arrived on time 73% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon76%(46 flights)
  • Tue77%(34 flights)
  • Wed59%(34 flights)
  • Thu73%(45 flights)
  • Fri66%(44 flights)
  • Sat77%(31 flights)
  • Sun80%(44 flights)
On-time by departure window
  • 6–9 PM68%(228 flights)
  • 9 PM–12 AM94%(50 flights)
On-time trend by month
77%
May

Jun 38% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202538%29
July 202555%31
August 202576%21
September 202583%12
October 202583%18
November 2025100%24
December 202591%11
January 202673%26
February 202675%20
March 202677%26
April 202673%30
May 202677%30
Departures on time
74%
Diverted
0.4%
Flights flown
278
Months covered
12

Same route, other flights

Keep nerding

Based on 282 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.