SFO: short TSA lines, big runway hit
San Francisco Airport’s security checkpoints are currently moving quickly—TSA wait times are reported at about 10–15 minutes—yet a planned six‑month runway closure will squeeze capacity and likely cause more delays in the air. That mix means checkpoints won’t feel chaotic, but arrivals, connections and schedules may become fragile as fewer runways handle the same traffic (ibtimes.com.au, thetraveler.org).
At San Francisco International Airport, the line that may stay short is the one before security, and the line that may get ugly is the one in the sky waiting to land. The airport says Runway 1 Right closed on March 30, 2026 and is not expected to reopen until October 2, 2026. (flysfo.com) That closure is not just one strip of pavement disappearing. San Francisco International Airport says the parallel north-south runway next to the work zone, Runway 1 Left, will stop handling takeoffs and landings too and will be used as a taxiway instead. (flysfo.com) So for about six months, arrivals and departures are being funneled onto Runways 28 Left and 28 Right, the east-west pair. San Francisco International Airport says that setup is common on clear, windy days, but using it full time squeezes the airport into fewer operating options. (flysfo.com) Then the Federal Aviation Administration added a second constraint on March 31, 2026. The agency said planes can no longer make side-by-side approaches to those parallel east-west runways in clear weather and must instead use staggered approaches, with one aircraft offset from the other. (faa.gov) That sounds technical, but the effect is simple: fewer planes can be fed into the airport at once. KQED reported the Federal Aviation Administration told it this rule change would slow the arrival flow at the same time the runway project is already reducing flexibility. (kqed.org) Security is a different story because the bottleneck there is not runway space. San Francisco International Airport says it has six security checkpoints, and all of them offer Transportation Security Administration PreCheck, priority lanes, and CLEAR lanes. (flysfo.com) The airport also runs under the Transportation Security Administration’s Screening Partnership Program, which means screening is supervised by federal staff but carried out by Covenant Aviation Security. San Francisco International Airport has pointed to that setup in past alerts explaining why checkpoint operations can stay more stable than travelers might expect during broader federal disruptions. (flysfo.com) That is why a traveler can walk through security in roughly 10 to 15 minutes and still miss a tight connection later in the trip. Once you are airside, the bigger risk is that an inbound plane gets held, a departure bank slips, or a connection window that looked comfortable on paper gets eaten by a 20 to 30 minute delay. (ibtimes.com.au, flysfo.com) San Francisco International Airport says it expects fewer than 10% of flights to be delayed by the runway closure itself, with average delays under 30 minutes, and it says the most likely crunch points are around 9:00 a.m. and from 8:00 p.m. to 9:00 p.m. Those are manageable numbers if you are ending your trip in San Francisco and much less comfortable if you are changing planes on a short layover. (flysfo.com) There is one small advantage inside the terminal: San Francisco International Airport says all terminals are connected both before and after security, and passengers can enter through any checkpoint with a valid same-day boarding pass. That gives travelers a way to dodge a slower checkpoint even when the runway situation outside is fixed for months. (flysfo.com) The practical read on San Francisco right now is strange but clear. The airport front door may feel calm, while the runway system behind it is operating like a four-lane highway narrowed to two lanes with a new merge rule added at the same time. (flysfo.com, faa.gov)
