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Flight Reliability

DL 1553 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1553 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

83%
Arrive within 15 minutes
1 min early
Average arrival delay
0.8%
Cancelled
10 min early
Median arrival delay

Based on 610 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(87 flights)
  • Tue73%(88 flights)
  • Wed91%(85 flights)
  • Thu85%(88 flights)
  • Fri76%(84 flights)
  • Sat87%(84 flights)
  • Sun83%(88 flights)
On-time by departure window
  • 9 AM–12 PM83%(338 flights)
  • 12–3 PM84%(237 flights)
  • 6–9 PM90%(29 flights)
On-time trend by month
87%
May

Jun 78% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%60
July 202571%62
August 202594%62
September 202582%60
October 202574%34
November 202593%29
December 202586%42
January 202681%62
February 202683%52
March 202691%33
April 202687%46
May 202687%62
Departures on time
84%
Diverted
0.2%
Flights flown
604
Months covered
12

Keep nerding

Based on 610 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.