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Flight Reliability

DL 303 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 303 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

68%
Arrive within 15 minutes
22 min
Average arrival delay
3.1%
Cancelled
2 min early
Median arrival delay

Based on 477 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(73 flights)
  • Tue64%(74 flights)
  • Wed69%(70 flights)
  • Thu68%(75 flights)
  • Fri81%(73 flights)
  • Sat43%(21 flights)
  • Sun66%(73 flights)
On-time by departure window
  • 12–3 PM67%(163 flights)
  • 3–6 PM67%(75 flights)
  • 6–9 PM70%(220 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
79%
May

Jun 52% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202552%52
July 202551%51
August 202568%41
September 202566%44
October 202563%54
November 202560%30
December 202568%28
January 202687%23
February 202691%21
March 202685%27
April 202681%41
May 202679%47
Departures on time
69%
Diverted
0.6%
Flights flown
459
Months covered
12

Keep nerding

Based on 477 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.