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Flight Reliability

DL 4274 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4274 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

82%
Arrive within 15 minutes
6 min
Average arrival delay
4.8%
Cancelled
13 min early
Median arrival delay

Based on 726 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(96 flights)
  • Tue78%(97 flights)
  • Wed89%(94 flights)
  • Thu81%(100 flights)
  • Fri85%(97 flights)
  • Sat81%(103 flights)
  • Sun79%(102 flights)
On-time by departure window
  • 6–9 AM76%(225 flights)
  • 9 AM–12 PM77%(225 flights)
  • 12–3 PM93%(238 flights)
  • 3–6 PM—(1 flights)
On-time trend by month
79%
May

Jun 90% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%60
July 202589%61
August 202595%62
September 202598%60
October 202589%62
November 202585%52
December 202570%56
January 202664%58
February 202675%48
March 202671%49
April 202678%59
May 202679%62
Departures on time
84%
Diverted
0.3%
Flights flown
689
Months covered
12

Keep nerding

Based on 726 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.