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Flight Reliability

DL 1598 · Delta Air Lines

San Francisco → Los Angeles (SFO–LAX)

100
Nerd Approved
WanderNerd Reliability Score
95%
Arrive within 15 minutes
3 min early
Average arrival delay
0.6%
Cancelled
14 min early
Median arrival delay

Based on 361 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 3–6 AM arrived on time 97% of the time, against 93% between 6–9 AM.

Tuesday comes out ahead.

A small edge: 96% on time on Tuesdays against 92% on Thursdays.

Well ahead of the SFO–LAX route.

DL 1598 arrived on time 95% of the time, versus 76% across the SFO–LAX route.

Better than the Delta Air Lines network average.

DL 1598 arrived on time 95% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon94%(52 flights)
  • Tue96%(51 flights)
  • Wed94%(52 flights)
  • Thu92%(52 flights)
  • Fri96%(51 flights)
  • Sat94%(50 flights)
  • Sun96%(51 flights)
On-time by departure window
  • 3–6 AM97%(160 flights)
  • 6–9 AM93%(199 flights)
On-time trend by month
87%
May

Jun 97% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202590%30
August 202597%29
September 202597%30
October 202597%30
November 202593%29
December 202590%31
January 2026100%31
February 2026100%27
March 202697%31
April 202693%30
May 202687%31
Departures on time
95%
Diverted
0%
Flights flown
359
Months covered
12

Same route, other flights

Keep nerding

Based on 361 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.