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Flight Reliability

DL 5240 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5240 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

84%
Arrive within 15 minutes
3 min
Average arrival delay
2.6%
Cancelled
10 min early
Median arrival delay

Based on 229 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(35 flights)
  • Tue82%(34 flights)
  • Wed81%(32 flights)
  • Thu87%(31 flights)
  • Fri90%(31 flights)
  • Sat82%(27 flights)
  • Sun75%(32 flights)
On-time by departure window
  • 6–9 AM92%(96 flights)
  • 9 AM–12 PM86%(72 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM67%(51 flights)
On-time trend by month
96%
May

Jun 76% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%21
July 202568%28
August 202573%30
September 202586%29
February 202673%11
April 202688%32
May 202696%50
Departures on time
85%
Diverted
0.4%
Flights flown
222
Months covered
10

Keep nerding

Based on 229 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.