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Flight Reliability

DL 383 · Delta Air Lines

San Francisco → New York (SFO–JFK)

86
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
5 min early
Average arrival delay
1.4%
Cancelled
16 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

DL 383 arrived on time 92% of the time on Tuesdays. On Mondays: 82%.

A bit ahead of the SFO–JFK route.

DL 383 arrived on time 87% of the time, versus 81% across the SFO–JFK route.

A bit ahead of the Delta Air Lines network.

DL 383 arrived on time 87% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon82%(50 flights)
  • Tue92%(52 flights)
  • Wed87%(52 flights)
  • Thu88%(51 flights)
  • Fri92%(50 flights)
  • Sat82%(51 flights)
  • Sun86%(51 flights)
On-time by departure window
  • 6–9 AM88%(24 flights)
  • 9 AM–12 PM87%(333 flights)
On-time trend by month
83%
May

Jun 77% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202576%29
August 202587%31
September 202590%30
October 202594%31
November 202590%30
December 202587%30
January 202683%30
February 202692%26
March 202697%31
April 202690%29
May 202683%30
Departures on time
89%
Diverted
0.8%
Flights flown
357
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.