Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5100 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5100 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

77%
Arrive within 15 minutes
12 min
Average arrival delay
1.6%
Cancelled
8 min early
Median arrival delay

Based on 444 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(64 flights)
  • Tue70%(64 flights)
  • Wed79%(67 flights)
  • Thu76%(66 flights)
  • Fri81%(62 flights)
  • Sat81%(47 flights)
  • Sun71%(66 flights)
On-time by departure window
  • 6–9 AM91%(119 flights)
  • 9 AM–12 PM76%(120 flights)
  • 12–3 PM67%(109 flights)
  • 3–6 PM62%(13 flights)
  • 6–9 PM—(2 flights)
  • 9 PM–12 AM75%(73 flights)
On-time trend by month
83%
May

Jun 89% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%35
July 202587%31
August 202590%30
September 202597%30
October 202584%31
November 202573%30
December 202572%39
January 202647%38
February 202654%26
March 202671%56
April 202684%55
May 202683%35
Departures on time
78%
Diverted
0.2%
Flights flown
436
Months covered
12

Keep nerding

Based on 444 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.