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Flight Reliability

DL 4013 · Delta Air Lines

Detroit → LEX (DTW–LEX)93% of its flights flew this route. The rest (MSP–OMA, DTW–MEM) are included in these numbers.

61
A Little Dicey
WanderNerd Reliability Score
72%
Arrive within 15 minutes
26 min
Average arrival delay
2.3%
Cancelled
2 min early
Median arrival delay

Based on 349 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 4013 departing between 9 PM–12 AM arrived on time 78% of the time, versus 70% between 6–9 PM.

Mondays have been rough.

DL 4013 arrived on time 85% of the time on Saturdays and just 60% on Mondays. That gap is worth planning around.

A bit behind the DTW–LEX route.

DL 4013 arrived on time 72% of the time, versus 79% across the DTW–LEX route.

Lagging the Delta Air Lines network.

DL 4013 arrived on time 72% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon60%(50 flights)
  • Tue80%(49 flights)
  • Wed66%(50 flights)
  • Thu69%(51 flights)
  • Fri69%(52 flights)
  • Sat85%(39 flights)
  • Sun78%(49 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM—(3 flights)
  • 3–6 PM—(3 flights)
  • 6–9 PM70%(253 flights)
  • 9 PM–12 AM78%(78 flights)
On-time trend by month
80%
May

Jun 64% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%25
July 202537%27
August 202579%29
September 202592%24
October 202587%31
November 202593%27
December 202568%28
January 202655%29
February 202672%29
March 202658%31
April 202677%30
May 202680%30
Departures on time
72%
Diverted
0.3%
Flights flown
340
Months covered
12

Same route, other flights

Keep nerding

Based on 349 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.