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Flight Reliability

DL 5230 · Delta Air Lines

Raleigh–Durham → Kansas City (RDU–MCI)98% of its flights flew this route. The rest (IND–DTW, LGA–CHA) are included in these numbers.

80
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
2 min
Average arrival delay
2.9%
Cancelled
8 min early
Median arrival delay

Based on 346 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

DL 5230 arrived on time 88% of the time on Wednesdays. On Fridays: 80%.

A bit ahead of the Delta Air Lines network.

DL 5230 arrived on time 85% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 5230 arrived on time 86% of the time over the last three months in the data, compared with 79% in the three months before that.

The breakdown

On-time by weekday
  • Mon83%(48 flights)
  • Tue88%(49 flights)
  • Wed88%(50 flights)
  • Thu87%(47 flights)
  • Fri80%(46 flights)
  • Sat81%(47 flights)
  • Sun83%(48 flights)
On-time by departure window
  • 6–9 AM85%(328 flights)
  • 12–3 PM—(1 flights)
  • 6–9 PM—(6 flights)
On-time trend by month
80%
May

Jun 86% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202573%26
August 202584%31
September 202587%30
October 202583%29
November 202597%30
December 202561%18
January 202683%24
February 202693%27
March 202690%31
April 202687%30
May 202680%30
Departures on time
87%
Diverted
0.3%
Flights flown
335
Months covered
12

Same route, other flights

Keep nerding

Based on 346 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.