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Flight Reliability

DL 1147 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1147 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

78%
Arrive within 15 minutes
8 min
Average arrival delay
3.1%
Cancelled
4 min early
Median arrival delay

Based on 721 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(100 flights)
  • Tue77%(98 flights)
  • Wed85%(102 flights)
  • Thu76%(104 flights)
  • Fri76%(102 flights)
  • Sat78%(90 flights)
  • Sun82%(99 flights)
On-time by departure window
  • 6–9 AM68%(34 flights)
  • 9 AM–12 PM79%(636 flights)
  • 12–3 PM76%(25 flights)
On-time trend by month
88%
May

Jun 71% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%59
July 202581%59
August 202590%61
September 202597%60
October 202584%61
November 202575%60
December 202557%60
January 202670%56
February 202686%56
March 202662%52
April 202678%60
May 202688%51
Departures on time
81%
Diverted
0.6%
Flights flown
695
Months covered
12

Keep nerding

Based on 721 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.