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Flight Reliability

DL 5009 · Delta Air Lines

Raleigh–Durham → New York (RDU–JFK)92% of its flights flew this route. The rest (FAR–MSP) are included in these numbers.

56
A Little Dicey
WanderNerd Reliability Score
71%
Arrive within 15 minutes
14 min
Average arrival delay
5.1%
Cancelled
7 min early
Median arrival delay

Based on 276 historical flights. Data through May 2026.

What the data says

The 3–6 AM departure wins.

DL 5009 departing between 3–6 AM arrived on time 87% of the time, versus 65% between 9 AM–12 PM.

Mondays have been rough.

DL 5009 arrived on time 82% of the time on Thursdays and just 56% on Mondays. That gap is worth planning around.

A bit behind the RDU–JFK route.

DL 5009 arrived on time 71% of the time, versus 76% across the RDU–JFK route.

Lagging the Delta Air Lines network.

DL 5009 arrived on time 71% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon56%(36 flights)
  • Tue78%(36 flights)
  • Wed72%(36 flights)
  • Thu82%(38 flights)
  • Fri75%(40 flights)
  • Sat74%(38 flights)
  • Sun58%(38 flights)
On-time by departure window
  • 3–6 AM87%(23 flights)
  • 9 AM–12 PM65%(96 flights)
  • 12–3 PM75%(137 flights)
  • 6–9 PM—(6 flights)
On-time trend by month
62%
May

Jun 59% → May 62% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%29
July 202553%30
August 202580%30
October 202584%19
January 202676%25
February 202680%25
March 202677%30
April 202673%30
May 202662%29
Departures on time
72%
Diverted
0%
Flights flown
262
Months covered
12

Same route, other flights

Keep nerding

Based on 276 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.