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Route Reliability

San Francisco → SUN

SFO–SUN · 587 miles · San Francisco International Airport to SUN Airport

90
Nerd Approved
WanderNerd Reliability Score
85%
Arrive within 15 minutes
4 min
Average arrival delay
0.4%
Cancelled
276
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 85% of the time across 276 flights. No comparison to make.

What the data says

Departure time hasn't mattered much.

On-time rates stay between 85% and 87% across the day.

Skip Thursday if you can.

SFO–SUN flights arrived on time 92% of the time on Saturdays. On Thursdays: 81%.

Ticking up lately.

SFO–SUN flights arrived on time 85% of the time over the last three months in the data, compared with 79% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon86%(29 flights)
  • Tue85%(27 flights)
  • Wed85%(26 flights)
  • Thu81%(42 flights)
  • Fri82%(56 flights)
  • Sat92%(61 flights)
  • Sun82%(33 flights)
On-time by departure window
  • 6–9 AM87%(15 flights)
  • 9 AM–12 PM85%(107 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM86%(143 flights)
On-time trend by month
80%
May

Jun 80% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%15
July 202582%34
August 202597%34
September 2025100%13
October 202582%11
December 202571%31
January 202684%43
February 202678%37
March 202697%39
May 202680%10

Keep nerding

Based on 276 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.