Travelers heading through San Francisco International Airport (SFO) should plan for moderate security lines with average waits of 15 to 25 minutes during peak morning and evening hours, as passenger volumes increase with the spring travel season in full swing.

As of mid-morning on April 16, 2026, the security checkpoints at SFO reported standard lane waits of around 18 minutes on average. Some off-peak periods saw shorter waits of 8 to 10 minutes, while busier afternoon windows saw wait times of up to 19 minutes. TSA PreCheck lanes were significantly faster, often clearing in under 5 minutes when available.

Unlike many US airports, which are staffed by federal TSA employees, SFO relies on a private contractor model for screening. This has historically helped the airport avoid some staffing shortages and federal disruptions, resulting in more predictable wait times compared to other hubs like Los Angeles International or New York-area airports.

Currently, most checkpoints at SFO are operating smoothly. In Terminal 1, Boarding Areas B and C are open, while Terminal 2’s Boarding Area D remains active. In Terminal 3, Boarding Area F1 is open, but F3 is closed. In the International Terminal, Boarding Areas A and G are operational. Travelers should double-check their assigned terminal and boarding area, as closures or consolidations may cause unexpected changes in security lines.

Hourly breakdowns from monitoring sites show lighter overnight traffic with waits as short as 4 to 8 minutes between midnight and 2 a. m. Wait times ramp up to 14-18 minutes around 3 to 6 a. m. , and trend towards 10-15 minutes during midday periods. Late afternoon and early evening slots, particularly between 4 p. m. and 7 p. m. , represent the daily peaks with expected wait times of up to 19 minutes. These figures are based on data from airport reports, traveler submissions, and third-party aggregators, which are updated every 10 minutes.

Although spring break crowds have passed, April still brings steady domestic and international traffic to SFO, fueled by business trips, family visits, and leisure getaways to Asia and Europe. United Airlines, SFO’s largest carrier, operates extensive hubs here with flights to dozens of domestic cities and key Pacific routes. Delta, American, Alaska, and numerous international airlines also contribute to the high passenger volume, with busy days seeing over 100,000 passengers.

SFO officials recommend arriving at least two hours before domestic flights and three hours for international departures to allow enough time for check-in, security, and potential gate changes. Travelers with TSA PreCheck, CLEAR, or airline status can use dedicated lanes, significantly reducing their wait times. The MyTSA mobile app provides real-time crowd-sourced updates and historical patterns, helping passengers plan their arrival time.

The security experience at SFO follows standard TSA protocols, including the removal of liquids in 3-1