67ms each way. My UK-Syd latency is currently 265ms, in theory it could be as low as 112ms if it were in a vacuum. In glass with a refractive index of 1.3-1.5,

67ms each way. My UK-Syd latency is currently 265ms, in theory it could be as low as 112ms if it were in a vacuum. In glass with a refractive index of 1.3-1.5, you’re looking at nearer 150-170ms rtt. Starlink and similar Leo satellites might even have a lower latency as they use laser via vacuum