Security wait times at San Diego Airport and not usually excessive and many regular travellers report smooth sailing. If you prefer to err on the side of caution then the standard Airport and Airline advice then you should arrive at SAN Airport 2 hours before a domestic flight and 3 hours for international. If you have TSA PreCheck you should be safe to shave a little off of those times.
Of course, having TSA PreCheck membership will get you through the security lines a little quicker than without it. You can view the estimated TSA PreCheck wait times and the open lanes above. To find out more about joining or renewing TSA PreCheck membership visit and the associated benefits visit https://www.tsa.gov/precheck.
We don't have much feedback or data on the wait times at SAN for international arrivals but would expect it to be acceptable given the domestic departure security times are reasonable. If you are landing at San Diego and have not already been processed elsewhere in the US your wait time will be considerably longer.
For further information about the San Diego Airport wait times, TSA PreCheck, checked baggage allowance, lost and found and more visit https://www.san.org/