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Flight Reliability

DL 731 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 731 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

73%
Arrive within 15 minutes
10 min
Average arrival delay
0.5%
Cancelled
3 min early
Median arrival delay

Based on 389 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(56 flights)
  • Tue67%(60 flights)
  • Wed70%(60 flights)
  • Thu77%(57 flights)
  • Fri84%(56 flights)
  • Sat66%(38 flights)
  • Sun65%(57 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM75%(44 flights)
  • 3–6 PM77%(56 flights)
  • 6–9 PM71%(112 flights)
  • 9 PM–12 AM74%(171 flights)
On-time trend by month
72%
May

Jun 56% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%18
July 202570%27
August 202585%27
September 202573%26
October 202574%23
November 202575%20
December 202571%38
January 202680%35
February 202674%27
March 202669%52
April 202679%38
May 202672%53
Departures on time
75%
Diverted
0.8%
Flights flown
384
Months covered
12

Keep nerding

Based on 389 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.