Starshot estimates 20-30 years for a flyby probe (or, more likely, a swarm of them)... starting a few decades from now: https://en.wikipedia.org/wiki/Breakthrou

Starshot estimates 20-30 years for a flyby probe (or, more likely, a swarm of them)... starting a few decades from now: https://en.wikipedia.org/wiki/Breakthrough_Starshot https://en.wikipedia.org/wiki/Breakthrough_Starshot