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Flight Reliability

DL 543 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 543 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

86%
Arrive within 15 minutes
9 min
Average arrival delay
2.0%
Cancelled
11 min early
Median arrival delay

Based on 355 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(56 flights)
  • Tue74%(31 flights)
  • Wed83%(35 flights)
  • Thu96%(53 flights)
  • Fri93%(55 flights)
  • Sat82%(65 flights)
  • Sun79%(53 flights)
On-time by departure window
  • 9 AM–12 PM82%(17 flights)
  • 12–3 PM85%(74 flights)
  • 3–6 PM82%(145 flights)
  • 6–9 PM—(2 flights)
  • 9 PM–12 AM92%(110 flights)
On-time trend by month
90%
May

Jun 89% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%26
July 202564%22
August 202593%27
September 202596%25
October 2025100%23
November 202594%17
December 202582%17
January 202673%15
February 202677%44
March 202684%61
April 202688%40
May 202690%31
Departures on time
83%
Diverted
0%
Flights flown
348
Months covered
12

Keep nerding

Based on 355 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.