Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 1643 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 1643 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

82%
Arrive within 15 minutes
0 min
Average arrival delay
1.6%
Cancelled
12 min early
Median arrival delay

Based on 549 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(80 flights)
  • Tue87%(77 flights)
  • Wed82%(72 flights)
  • Thu72%(79 flights)
  • Fri92%(78 flights)
  • Sat81%(73 flights)
  • Sun71%(80 flights)
On-time by departure window
  • 6–9 AM91%(11 flights)
  • 9 AM–12 PM85%(58 flights)
  • 12–3 PM83%(244 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM81%(211 flights)
  • 9 PM–12 AM82%(11 flights)
On-time trend by month
81%
May

Jun 63% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%51
July 202569%62
August 202581%62
September 202595%60
October 202589%61
November 202588%57
December 202587%46
February 202682%22
March 202690%29
April 202686%28
May 202681%53
Departures on time
84%
Diverted
0.2%
Flights flown
539
Months covered
12

Keep nerding

Based on 549 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.