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Flight Reliability

DL 1225 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1225 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

76%
Arrive within 15 minutes
16 min
Average arrival delay
2.8%
Cancelled
3 min early
Median arrival delay

Based on 617 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(85 flights)
  • Tue84%(79 flights)
  • Wed73%(84 flights)
  • Thu81%(90 flights)
  • Fri83%(88 flights)
  • Sat70%(83 flights)
  • Sun66%(88 flights)
On-time by departure window
  • 6–9 AM73%(15 flights)
  • 12–3 PM80%(249 flights)
  • 3–6 PM74%(249 flights)
  • 6–9 PM70%(84 flights)
On-time trend by month
74%
May

Jun 68% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%50
July 202580%59
August 202583%60
September 202590%52
October 202590%58
November 202578%45
December 202574%43
January 202666%29
February 202680%45
March 202655%60
April 202669%42
May 202674%54
Departures on time
79%
Diverted
0.5%
Flights flown
597
Months covered
12

Keep nerding

Based on 617 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.