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Flight Reliability

DL 3944 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3944 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

87%
Arrive within 15 minutes
1 min
Average arrival delay
0.3%
Cancelled
9 min early
Median arrival delay

Based on 651 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(92 flights)
  • Tue92%(92 flights)
  • Wed90%(92 flights)
  • Thu91%(93 flights)
  • Fri80%(93 flights)
  • Sat82%(93 flights)
  • Sun87%(93 flights)
On-time by departure window
  • 6–9 AM—(2 flights)
  • 9 AM–12 PM93%(358 flights)
  • 12–3 PM86%(193 flights)
  • 3–6 PM65%(74 flights)
  • 6–9 PM81%(21 flights)
On-time trend by month
85%
Apr

Jun 100% → Apr 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%60
July 202598%62
August 202598%62
September 202596%54
October 202595%62
November 2025100%60
December 202584%61
January 202669%62
February 202679%56
March 202657%60
April 202685%40
Departures on time
87%
Diverted
0.2%
Flights flown
648
Months covered
12

Keep nerding

Based on 651 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.