The problem isn’t the airport. It’s the lateral separation requirements for IFR aircraft on the ILS. Most airliners can land in 0-0, but you can’t do 0-0 landin

The problem isn’t the airport. It’s the lateral separation requirements for IFR aircraft on the ILS. Most airliners can land in 0-0, but you can’t do 0-0 landings on parallel runways with the ILS because of lateral separation requirements. There is also flow control that is from the FAA — under IFR the acceptance rates are reduced. The short answer isn’t that SFO isn’t “upgraded” but the rate of aircraft acceptance is reduced under low visibility conditions per the FAA — and for good reason, separation of aircraft. Here is more explanation: https://media.flysfo.com/media/sfo/media/weather-operations-primer_0.pdf https://media.flysfo.com/media/sfo/media/weather-operations-...