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Flight Reliability

DL 1020 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1020 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
11 min
Average arrival delay
2.3%
Cancelled
7 min early
Median arrival delay

Based on 347 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(55 flights)
  • Tue80%(55 flights)
  • Wed75%(56 flights)
  • Thu76%(54 flights)
  • Fri71%(51 flights)
  • Sat76%(21 flights)
  • Sun79%(47 flights)
On-time by departure window
  • 6–9 AM73%(40 flights)
  • 9 AM–12 PM76%(187 flights)
  • 12–3 PM85%(60 flights)
  • 3–6 PM71%(52 flights)
On-time trend by month
70%
May

Jun 65% → May 70% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%23
July 202572%25
August 202580%25
September 202596%26
October 202589%26
November 202567%24
December 202564%25
January 202674%42
February 202687%37
March 202671%28
April 202679%28
May 202670%30
Departures on time
78%
Diverted
0%
Flights flown
339
Months covered
12

Keep nerding

Based on 347 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.