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Flight Reliability

DL 4970 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4970 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

80%
Arrive within 15 minutes
2 min
Average arrival delay
4.2%
Cancelled
10 min early
Median arrival delay

Based on 308 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(43 flights)
  • Tue81%(43 flights)
  • Wed74%(43 flights)
  • Thu87%(45 flights)
  • Fri83%(48 flights)
  • Sat92%(26 flights)
  • Sun64%(45 flights)
On-time by departure window
  • 6–9 AM93%(15 flights)
  • 9 AM–12 PM100%(16 flights)
  • 12–3 PM89%(37 flights)
  • 3–6 PM73%(150 flights)
  • 6–9 PM83%(75 flights)
On-time trend by month
85%
May

Jun 70% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%33
July 202550%26
August 202571%34
September 202579%34
October 202589%44
December 2025100%12
February 202690%29
April 202681%16
May 202685%53
Departures on time
79%
Diverted
0.6%
Flights flown
293
Months covered
11

Keep nerding

Based on 308 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.