Rather than a single-day speedboat tour, some travellers string together several islands over 2-4 days — a different kind of trip with real trade-offs against the standard day-tour model.
What this typically looks like
A combination of liveaboard time, island-based accommodation (on Phi Phi Don or one of the Koh Yao islands, for example) and daily boat transfers between snorkelling or diving spots, rather than returning to a Phuket base each night.
Why choose this over day trips
Day trips from Phuket spend a meaningful chunk of the day just travelling to and from the islands. A multi-day trip removes that repeated transit time, in exchange for less flexibility and a bigger overall time commitment.
Who it suits
Travellers with 4+ days to dedicate specifically to the outer islands, rather than treating them as one add-on day within a broader Phuket-based trip.