At the same time, the proportion of flights delayed 15+ minutes more than doubled, rising from 18% to 41%. During the closure, arrivals and departures were concentrated on 28L and 28R, while parallel Runway 1L was repurposed as an additional taxiway. SFO Operational Measure 2025 2026 Flights delayed ≥15 minutes 18% 41% Departures delayed ≥15 minutes 16% 45% Arrivals delayed ≥15 minutes 20% 37% Average delay across all flights 5 minutes 21 minutes Planned clear-weather arrival capacity 54/hour 36/hourThe average delay is particularly revealing because it includes flights that operated on or close to schedule. Inbound flights were held an average of 2 hours and 44 minutes, with 413 flights delayed and 47 canceled, while the maximum assigned delay approached 10 hours. “On August 12th, the FAA will implement a revised procedure to allow for staggered parallel landings at SFO," he explained.