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Flight Reliability

DL 3139 · Delta Air Lines

Atlanta → Charlotte (ATL–CLT)

73
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
12 min
Average arrival delay
1.8%
Cancelled
2 min early
Median arrival delay

Based on 340 historical flights. Data through May 2026.

What the data says

Saturdays have been rough.

DL 3139 arrived on time 79% of the time on Wednesdays and just 63% on Saturdays. That gap is worth planning around.

A bit behind the ATL–CLT route.

DL 3139 arrived on time 73% of the time, versus 80% across the ATL–CLT route.

Lagging the Delta Air Lines network.

DL 3139 arrived on time 73% of the time, versus 81% across the Delta Air Lines network.

Slipping a little lately.

DL 3139 arrived on time 70% of the time over the last three months in the data, compared with 77% in the three months before that.

The breakdown

On-time by weekday
  • Mon73%(52 flights)
  • Tue67%(48 flights)
  • Wed79%(48 flights)
  • Thu73%(52 flights)
  • Fri76%(50 flights)
  • Sat63%(32 flights)
  • Sun77%(52 flights)
On-time by departure window
  • 3–6 PM—(1 flights)
  • 6–9 PM73%(333 flights)
On-time trend by month
75%
May

Jun 65% → May 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%26
July 202563%27
August 202579%29
September 202573%30
October 202571%31
November 202582%28
December 202558%31
January 202686%29
February 202686%28
March 202674%27
April 202660%20
May 202675%28
Departures on time
76%
Diverted
0%
Flights flown
334
Months covered
12

Same route, other flights

Keep nerding

Based on 340 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.