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Flight Reliability

DL 781 · Delta Air Lines

New York → Las Vegas (JFK–LAS)88% of its flights flew this route. The rest (ATL–BTR, BTR–ATL) are included in these numbers.

70
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
5 min
Average arrival delay
2.9%
Cancelled
8 min early
Median arrival delay

Based on 244 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 781 departing between 3–6 PM arrived on time 100% of the time, versus 70% between 9 PM–12 AM.

Thursdays have been rough.

DL 781 arrived on time 90% of the time on Tuesdays and just 69% on Thursdays. That gap is worth planning around.

A bit behind the JFK–LAS route.

DL 781 arrived on time 73% of the time, versus 80% across the JFK–LAS route.

Lagging the Delta Air Lines network.

DL 781 arrived on time 73% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon72%(53 flights)
  • Tue90%(10 flights)
  • Wed90%(10 flights)
  • Thu69%(52 flights)
  • Fri74%(49 flights)
  • Sat73%(11 flights)
  • Sun73%(52 flights)
On-time by departure window
  • 6–9 AM—(4 flights)
  • 12–3 PM92%(13 flights)
  • 3–6 PM100%(13 flights)
  • 9 PM–12 AM70%(207 flights)
On-time trend by month
57%
May

Jun 65% → May 57% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%20
July 202538%16
August 202582%17
September 202571%17
October 202556%16
November 202567%18
December 202591%32
January 202696%22
February 202692%13
March 202678%18
April 202674%27
May 202657%21
Departures on time
76%
Diverted
0%
Flights flown
237
Months covered
12

Same route, other flights

Keep nerding

Based on 244 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.