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Flight Reliability

DL 2020 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 2020 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
3 min early
Average arrival delay
1.2%
Cancelled
13 min early
Median arrival delay

Based on 605 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(93 flights)
  • Tue87%(93 flights)
  • Wed86%(93 flights)
  • Thu89%(92 flights)
  • Fri75%(92 flights)
  • Sat70%(37 flights)
  • Sun83%(96 flights)
On-time by departure window
  • 9 AM–12 PM77%(146 flights)
  • 12–3 PM85%(373 flights)
  • 3–6 PM90%(77 flights)
On-time trend by month
86%
May

Jun 87% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%46
July 202560%45
August 202579%42
September 202594%36
October 202590%60
November 202571%51
December 202578%60
January 202681%43
February 202691%56
March 202687%55
April 202694%52
May 202686%50
Departures on time
81%
Diverted
0.3%
Flights flown
596
Months covered
12

Keep nerding

Based on 605 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.