Daily but limited slots (~19:00 from Puno on the through pass). Hop-on/hop-off model — most overnight in Copacabana since the ferry forces a daytime crossing.
Tourist-shuttle style with an onboard bilingual host who walks the whole group through the Kasani crossing (both the Peru exit and the Bolivia entry incl. the QR step), so you skip the lonely DIY queues. Same bus continues; then crosses the Tiquina Strait by ferry. Bolivia +1h.
It’s a hop PASS, not a point-to-point ticket — one-directional and priced for onward travel through Bolivia, so it only makes sense if you’re continuing. Pricier, fewer departures; the ~US$30+ quote is for the Titicaca leg of a larger pass.
The low-stress, hand-holding option: central hotel pickup/dropoff, English-speaking host, proactive comms about strikes/closures, traveler-crowd vibe. Best for first-timers nervous about the land border.