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Flight Reliability

DL 1151 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1151 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

90%
Arrive within 15 minutes
7 min early
Average arrival delay
1.4%
Cancelled
11 min early
Median arrival delay

Based on 628 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(93 flights)
  • Tue89%(85 flights)
  • Wed93%(85 flights)
  • Thu94%(87 flights)
  • Fri97%(88 flights)
  • Sat92%(86 flights)
  • Sun90%(92 flights)
On-time by departure window
  • 9 AM–12 PM90%(371 flights)
  • 12–3 PM91%(245 flights)
On-time trend by month
89%
May

Jun 88% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%50
July 202594%62
August 202597%61
September 202594%50
October 202592%62
November 202591%56
December 202582%54
January 202688%43
February 202696%44
March 202687%45
April 202685%34
May 202689%55
Departures on time
90%
Diverted
0.5%
Flights flown
616
Months covered
12

Keep nerding

Based on 628 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.