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Flight Reliability

DL 4999 · Delta Air Lines

New York → Cincinnati (LGA–CVG)

43
Bring Snacks
WanderNerd Reliability Score
67%
Arrive within 15 minutes
25 min
Average arrival delay
6.1%
Cancelled
1 min early
Median arrival delay

Based on 346 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 4999 departing between 3–6 PM arrived on time 69% of the time, versus 51% between 6–9 PM.

Thursdays have been rough.

DL 4999 arrived on time 74% of the time on Fridays and just 58% on Thursdays. That gap is worth planning around.

A bit behind the LGA–CVG route.

DL 4999 arrived on time 67% of the time, versus 73% across the LGA–CVG route.

Lagging the Delta Air Lines network.

DL 4999 arrived on time 67% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon61%(46 flights)
  • Tue69%(51 flights)
  • Wed71%(49 flights)
  • Thu58%(45 flights)
  • Fri74%(50 flights)
  • Sat65%(37 flights)
  • Sun68%(47 flights)
On-time by departure window
  • 3–6 PM69%(286 flights)
  • 6–9 PM51%(39 flights)
On-time trend by month
61%
May

Jun 48% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%27
July 202548%27
August 202587%31
September 202589%26
October 202558%26
November 202552%23
December 202560%25
January 202677%26
February 202692%26
March 202657%28
April 202669%29
May 202661%31
Departures on time
69%
Diverted
0%
Flights flown
325
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.