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Flight Reliability

DL 979 · Delta Air Lines

Los Angeles → New York (LAX–JFK)

81
Pretty Reliable
WanderNerd Reliability Score
88%
Arrive within 15 minutes
3 min early
Average arrival delay
1.9%
Cancelled
12 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 979 arrived on time 94% of the time on Fridays. On Sundays: 82%.

Better than the LAX–JFK route average.

DL 979 arrived on time 88% of the time, versus 79% across the LAX–JFK route.

A bit ahead of the Delta Air Lines network.

DL 979 arrived on time 88% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 979 arrived on time 93% of the time over the last three months in the data, compared with 81% in the three months before that.

The breakdown

On-time by weekday
  • Mon83%(48 flights)
  • Tue83%(52 flights)
  • Wed90%(52 flights)
  • Thu89%(47 flights)
  • Fri94%(49 flights)
  • Sat92%(51 flights)
  • Sun82%(50 flights)
On-time by departure window
  • 6–9 AM88%(347 flights)
  • 9 AM–12 PM—(2 flights)
On-time trend by month
93%
May

Jun 87% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202583%29
August 2025100%31
September 202590%29
October 202583%29
November 202586%28
December 202583%29
January 202680%30
February 202681%26
March 202690%29
April 202697%29
May 202693%30
Departures on time
87%
Diverted
1.9%
Flights flown
349
Months covered
12

Same route, other flights

Keep nerding

Based on 363 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.