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Flight Reliability

DL 4273 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4273 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

85%
Arrive within 15 minutes
2 min
Average arrival delay
1.7%
Cancelled
14 min early
Median arrival delay

Based on 536 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(102 flights)
  • Tue71%(14 flights)
  • Wed—(6 flights)
  • Thu79%(102 flights)
  • Fri87%(102 flights)
  • Sat88%(104 flights)
  • Sun88%(97 flights)
On-time by departure window
  • 6–9 AM85%(27 flights)
  • 9 AM–12 PM85%(500 flights)
On-time trend by month
100%
May

Jun 89% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%44
July 202586%44
August 202589%44
September 202578%46
October 202596%44
November 202588%42
December 202572%46
January 202673%44
February 202674%39
March 202686%42
April 202686%42
May 2026100%50
Departures on time
87%
Diverted
0%
Flights flown
527
Months covered
12

Keep nerding

Based on 536 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.