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Flight Reliability

DL 1220 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1220 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

68%
Arrive within 15 minutes
17 min
Average arrival delay
0.3%
Cancelled
4 min early
Median arrival delay

Based on 318 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon57%(51 flights)
  • Tue67%(48 flights)
  • Wed78%(46 flights)
  • Thu68%(47 flights)
  • Fri78%(50 flights)
  • Sat78%(27 flights)
  • Sun57%(46 flights)
On-time by departure window
  • 12–3 PM—(4 flights)
  • 3–6 PM80%(55 flights)
  • 6–9 PM66%(256 flights)
On-time trend by month
68%
May

Jun 28% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202528%25
July 202523%22
August 202552%29
September 202586%29
October 202584%31
November 202583%29
December 202547%17
January 202672%25
February 202679%28
March 202686%29
April 202689%26
May 202668%25
Departures on time
65%
Diverted
0.6%
Flights flown
315
Months covered
12

Keep nerding

Based on 318 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.