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Flight Reliability

DL 3957 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 3957 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

67%
Arrive within 15 minutes
31 min
Average arrival delay
1.4%
Cancelled
2 min early
Median arrival delay

Based on 415 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon63%(59 flights)
  • Tue63%(60 flights)
  • Wed76%(58 flights)
  • Thu53%(57 flights)
  • Fri64%(58 flights)
  • Sat84%(56 flights)
  • Sun64%(61 flights)
On-time by departure window
  • 9 AM–12 PM100%(12 flights)
  • 3–6 PM64%(244 flights)
  • 6–9 PM76%(95 flights)
  • 9 PM–12 AM53%(58 flights)
On-time trend by month
86%
May

Jun 79% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%52
July 202549%61
August 202582%62
September 202590%20
January 202654%28
February 202664%28
March 202640%53
April 202653%40
May 202686%56
Departures on time
65%
Diverted
0%
Flights flown
409
Months covered
10

Keep nerding

Based on 415 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.