Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 3911 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3911 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

74%
Arrive within 15 minutes
18 min
Average arrival delay
2.0%
Cancelled
4 min early
Median arrival delay

Based on 304 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(45 flights)
  • Tue77%(44 flights)
  • Wed73%(44 flights)
  • Thu73%(45 flights)
  • Fri72%(46 flights)
  • Sat86%(28 flights)
  • Sun67%(46 flights)
On-time by departure window
  • 3–6 AM92%(38 flights)
  • 6–9 AM81%(32 flights)
  • 9 AM–12 PM—(3 flights)
  • 12–3 PM68%(165 flights)
  • 3–6 PM—(1 flights)
  • 6–9 PM75%(59 flights)
On-time trend by month
93%
May

Jun 50% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%20
July 202571%24
August 202568%28
September 202582%28
October 202570%27
November 202558%24
December 202571%17
January 202679%19
February 202687%23
March 202663%30
April 202686%29
May 202693%29
Departures on time
80%
Diverted
0%
Flights flown
298
Months covered
12

Keep nerding

Based on 304 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.