Skip to content
WanderNerd
Check a flight

Flight Reliability

DL 5259 · Delta Air Lines

Detroit → Cincinnati (DTW–CVG)87% of its flights flew this route. The rest (CVG–DTW, ATL–AVL) are included in these numbers.

87
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
3 min
Average arrival delay
1.1%
Cancelled
10 min early
Median arrival delay

Based on 371 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 87% of the time, against 83% between 9 AM–12 PM.

Sunday scaries are real for this one.

DL 5259 arrived on time 91% of the time on Tuesdays. On Sundays: 76%.

A bit ahead of the DTW–CVG route.

DL 5259 arrived on time 83% of the time, versus 78% across the DTW–CVG route.

Trending in the right direction.

DL 5259 arrived on time 85% of the time over the last three months in the data, compared with 73% in the three months before that.

The breakdown

On-time by weekday
  • Mon80%(54 flights)
  • Tue91%(54 flights)
  • Wed84%(50 flights)
  • Thu82%(50 flights)
  • Fri87%(52 flights)
  • Sat85%(52 flights)
  • Sun76%(55 flights)
On-time by departure window
  • 6–9 AM83%(321 flights)
  • 9 AM–12 PM83%(23 flights)
  • 12–3 PM87%(23 flights)
On-time trend by month
90%
May

Jun 86% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%29
July 202587%31
August 202590%31
September 202593%30
October 202590%31
November 202583%30
December 202569%35
January 202666%32
February 202686%28
March 202677%31
April 202687%30
May 202690%29
Departures on time
87%
Diverted
0%
Flights flown
367
Months covered
12

Same route, other flights

Keep nerding

Based on 371 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.