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Flight Reliability

DL 2504 · Delta Air Lines

Atlanta → Tallahassee (ATL–TLH)84% of its flights flew this route. The rest (ATL–BDL) are included in these numbers.

72
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
17 min
Average arrival delay
1.2%
Cancelled
4 min early
Median arrival delay

Based on 258 historical flights. Data through May 2026.

What the data says

Mondays have been rough.

DL 2504 arrived on time 89% of the time on Wednesdays and just 62% on Mondays. That gap is worth planning around.

A bit behind the ATL–TLH route.

DL 2504 arrived on time 75% of the time, versus 81% across the ATL–TLH route.

A bit behind the Delta Air Lines network.

DL 2504 arrived on time 75% of the time, versus 81% across the Delta Air Lines network.

Recent months have been rougher.

DL 2504 arrived on time 76% of the time over the last three months in the data, compared with 88% in the three months before that.

The breakdown

On-time by weekday
  • Mon62%(37 flights)
  • Tue78%(37 flights)
  • Wed89%(36 flights)
  • Thu83%(36 flights)
  • Fri66%(35 flights)
  • Sat78%(36 flights)
  • Sun69%(36 flights)
On-time by departure window
  • 6–9 PM76%(49 flights)
  • 9 PM–12 AM75%(204 flights)
On-time trend by month
80%
May

Jun 55% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202555%29
July 202558%31
August 202568%31
September 202593%30
October 202577%30
November 202593%27
December 202583%30
April 202664%11
May 202680%30
Departures on time
77%
Diverted
0.8%
Flights flown
253
Months covered
10

Same route, other flights

Keep nerding

Based on 258 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.