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Flight Reliability

DL 3976 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3976 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

72%
Arrive within 15 minutes
17 min
Average arrival delay
0.8%
Cancelled
4 min early
Median arrival delay

Based on 237 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(37 flights)
  • Tue73%(33 flights)
  • Wed66%(29 flights)
  • Thu66%(35 flights)
  • Fri84%(38 flights)
  • Sat65%(26 flights)
  • Sun64%(36 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM75%(61 flights)
  • 12–3 PM76%(53 flights)
  • 3–6 PM68%(119 flights)
On-time trend by month
81%
May

Jun 75% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%36
December 202594%18
January 202633%15
February 202667%33
March 202665%57
April 202679%42
May 202681%31
Departures on time
70%
Diverted
0.4%
Flights flown
234
Months covered
8

Keep nerding

Based on 237 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.