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Airport Reliability

SFO · San Francisco

San Francisco International Airport

79%
Departures within 15 minutes
13 min
Average departure delay
73%
Arrivals within 15 minutes
1.1%
Departures cancelled

Based on 149,200 departures and 149,279 arrivals. Data through May 2026.

What the data says

Morning flights do better here.

Departures from SFO departing between 3–6 AM arrived on time 95% of the time, versus 72% between 12–3 PM.

Saturday comes out ahead.

A small edge: 83% on time on Saturdays against 77% on Sundays.

Slipping a little lately.

Departures from SFO arrived on time 77% of the time over the last three months in the data, compared with 81% in the three months before that.

When SFO gets messy

On-time by departure window
  • 12–3 AM89%(1083 flights)
  • 3–6 AM95%(3576 flights)
  • 6–9 AM89%(27748 flights)
  • 9 AM–12 PM77%(30032 flights)
  • 12–3 PM72%(23886 flights)
  • 3–6 PM75%(20836 flights)
  • 6–9 PM77%(17919 flights)
  • 9 PM–12 AM78%(22097 flights)
On-time by weekday
  • Mon77%(21961 flights)
  • Tue83%(19713 flights)
  • Wed81%(20245 flights)
  • Thu77%(21761 flights)
  • Fri77%(21919 flights)
  • Sat83%(19408 flights)
  • Sun77%(22170 flights)
On-time trend by month
71%
May

Jun 79% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%12762
July 202575%13002
August 202580%12705
September 202583%11935
October 202580%12901
November 202579%12007
December 202577%12164
January 202683%11190
February 202682%10541
March 202685%12344
April 202675%12459
May 202671%13167

Airlines departing SFO

Busiest routes from SFO

Based on 149,200 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.