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Flight Reliability

DL 3970 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3970 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

77%
Arrive within 15 minutes
14 min
Average arrival delay
1.3%
Cancelled
9 min early
Median arrival delay

Based on 467 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(69 flights)
  • Tue77%(68 flights)
  • Wed77%(69 flights)
  • Thu66%(67 flights)
  • Fri83%(66 flights)
  • Sat72%(57 flights)
  • Sun86%(64 flights)
On-time by departure window
  • 12–3 PM74%(35 flights)
  • 3–6 PM75%(247 flights)
  • 6–9 PM80%(178 flights)
On-time trend by month
77%
May

Jun 66% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202566%58
July 202558%62
August 202573%62
September 202588%59
October 202592%60
November 2025100%16
January 202668%25
February 202693%14
March 202673%41
April 202689%37
May 202677%26
Departures on time
76%
Diverted
0.2%
Flights flown
460
Months covered
11

Keep nerding

Based on 467 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.