Mark Zuckerberg flies to Kauai for retreat at Ko'olau Ranch

Mark Zuckerberg departed Moffett Federal Airfield near San Jose, California, on May 10, 2026, bound for Lihue Airport in Kauai, Hawaii. Piloting his Gulfstream G700 with tail number N3880, the flight spanned nearly five hours, reaching a maximum altitude of 43,000 feet and speeds up to 484 knots over the Pacific.

The journey places Zuckerberg at his Ko'olau Ranch, a sprawling 2,300-acre compound on the island's north shore that he continues to expand with features including an underground bunker and self-sustaining infrastructure. As reported by Wired in July 2025, recent additions of nearly 1,000 acres for $65 million underscore the estate's evolution into a fortified retreat, drawing local scrutiny over its footprint on sacred lands.

Such Hawaii trips form a recurring pattern for Zuckerberg, whose briefing notes frequent flights to PHLI from his California base—though they have sparked climate concerns, with each round-trip emitting around 70 tons of CO₂, per tracking data.