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Flight Reliability

DL 4648 · Delta Air Lines

Kansas City → Raleigh–Durham (MCI–RDU)

59
A Little Dicey
WanderNerd Reliability Score
72%
Arrive within 15 minutes
23 min
Average arrival delay
3.7%
Cancelled
2 min early
Median arrival delay

Based on 347 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 4648 departing between 3–6 PM arrived on time 91% of the time, versus 71% between 6–9 PM.

Sunday scaries are real for this one.

DL 4648 arrived on time 81% of the time on Saturdays and just 60% on Sundays. That gap is worth planning around.

Lagging the Delta Air Lines network.

DL 4648 arrived on time 72% of the time, versus 81% across the Delta Air Lines network.

Keep a backup plan handy.

DL 4648 was cancelled 3.7% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon76%(49 flights)
  • Tue71%(49 flights)
  • Wed75%(47 flights)
  • Thu67%(46 flights)
  • Fri73%(48 flights)
  • Sat81%(47 flights)
  • Sun60%(48 flights)
On-time by departure window
  • 3–6 PM91%(11 flights)
  • 6–9 PM71%(323 flights)
On-time trend by month
76%
May

Jun 48% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202556%25
August 202583%30
September 202573%30
October 202587%30
November 202573%30
December 202544%18
January 202671%24
February 202682%28
March 202671%31
April 202683%30
May 202676%29
Departures on time
73%
Diverted
0%
Flights flown
334
Months covered
12

Same route, other flights

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.