Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 1720 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1720 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

75%
Arrive within 15 minutes
11 min
Average arrival delay
1.2%
Cancelled
5 min early
Median arrival delay

Based on 690 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(99 flights)
  • Tue73%(100 flights)
  • Wed77%(97 flights)
  • Thu83%(96 flights)
  • Fri77%(93 flights)
  • Sat70%(98 flights)
  • Sun59%(96 flights)
On-time by departure window
  • 12–3 PM74%(327 flights)
  • 3–6 PM75%(327 flights)
  • 6–9 PM76%(25 flights)
On-time trend by month
73%
May

Jun 58% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%59
July 202545%60
August 202573%62
September 202586%58
October 202575%61
November 202583%57
December 202567%54
January 202686%59
February 202682%56
March 202686%58
April 202681%58
May 202673%37
Departures on time
73%
Diverted
0.4%
Flights flown
679
Months covered
12

Keep nerding

Based on 690 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.