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Flight Reliability

DL 2439 · Delta Air Lines

Nashville → Detroit (BNA–DTW)

98
Nerd Approved
WanderNerd Reliability Score
94%
Arrive within 15 minutes
6 min early
Average arrival delay
1.1%
Cancelled
15 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 2439 arrived on time 98% of the time on Saturdays. On Sundays: 90%.

Better than the BNA–DTW route average.

DL 2439 arrived on time 94% of the time, versus 80% across the BNA–DTW route.

Better than the Delta Air Lines network average.

DL 2439 arrived on time 94% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 2439 arrived on time 96% of the time over the last three months in the data, compared with 92% in the three months before that.

The breakdown

On-time by weekday
  • Mon92%(51 flights)
  • Tue94%(51 flights)
  • Wed96%(52 flights)
  • Thu94%(52 flights)
  • Fri92%(51 flights)
  • Sat98%(52 flights)
  • Sun90%(52 flights)
On-time trend by month
100%
May

Jun 90% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%29
July 202590%30
August 2025100%31
September 202593%30
October 2025100%31
November 202590%30
December 202587%31
January 202693%29
February 202696%28
March 202690%31
April 202697%30
May 2026100%31
Departures on time
95%
Diverted
0%
Flights flown
361
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.