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Flight Reliability

DL 4891 · Delta Air Lines

Norfolk → New York (ORF–JFK)95% of its flights flew this route. The rest (FAY–ATL, DTW–MDT) are included in these numbers.

23
Bring Snacks
WanderNerd Reliability Score
61%
Arrive within 15 minutes
28 min
Average arrival delay
9.1%
Cancelled
1 min
Median arrival delay

Based on 340 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

DL 4891 departing between 6–9 AM arrived on time 100% of the time, versus 58% between 3–6 PM.

Skip Saturday if you can.

DL 4891 arrived on time 64% of the time on Wednesdays. On Saturdays: 55%.

Well behind the ORF–JFK route.

DL 4891 arrived on time 61% of the time, versus 77% across the ORF–JFK route.

Well behind the Delta Air Lines network.

DL 4891 arrived on time 61% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon63%(43 flights)
  • Tue61%(46 flights)
  • Wed64%(47 flights)
  • Thu61%(43 flights)
  • Fri62%(45 flights)
  • Sat55%(44 flights)
  • Sun61%(41 flights)
On-time by departure window
  • 6–9 AM100%(15 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM58%(291 flights)
  • 6–9 PM—(2 flights)
On-time trend by month
63%
Apr

Jun 32% → Apr 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202532%25
July 202539%18
August 202568%31
September 202548%29
October 202563%30
November 202569%26
December 202557%30
January 202685%27
February 202672%25
March 202657%30
April 202663%30
Departures on time
59%
Diverted
0%
Flights flown
309
Months covered
12

Same route, other flights

Keep nerding

Based on 340 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.