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Flight Reliability

DL 3503 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3503 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

96%
Arrive within 15 minutes
10 min early
Average arrival delay
0%
Cancelled
12 min early
Median arrival delay

Based on 252 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon97%(36 flights)
  • Tue100%(36 flights)
  • Wed100%(34 flights)
  • Thu92%(36 flights)
  • Fri89%(36 flights)
  • Sat95%(37 flights)
  • Sun97%(37 flights)
On-time by departure window
  • 6–9 AM97%(189 flights)
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM96%(26 flights)
  • 6–9 PM89%(36 flights)
On-time trend by month
96%
May

Jun 100% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%23
July 202596%26
August 202597%31
September 202597%30
October 202597%31
November 2025100%30
December 202590%19
March 202696%24
April 202675%12
May 202696%26
Departures on time
94%
Diverted
0%
Flights flown
252
Months covered
10

Keep nerding

Based on 252 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.