How far in advance to book Pompeii — the 20,000-ticket reality

Pompeii admits a maximum of 20,000 people per day, and every ticket is personal and named — your name is printed on it at purchase, and staff run ID spot checks at the turnstiles. That combination is what turned "we'll sort it out at the gate" from a plan into a gamble. Before the cap, a busy Saturday simply meant a slow queue; now a busy Saturday can mean no tickets exist for the date, at any price, because named tickets can't be resold or scalped back into circulation.

The second number matters more than the first. In high season the 20,000 splits into 15,000 tickets valid for entry before 13:00 and 5,000 after. Demand is not split that way — it piles almost entirely onto the morning, for three practical reasons: summer afternoons hit the mid-30s °C on shadeless stone, cruise and day-trip schedules all land people at the gate between 9:00 and 11:00, and last entry (17:30 in summer) makes a late start feel wasted. So the morning pool, big as it looks, is the one that empties days ahead. Afternoon tickets routinely survive after mornings are gone — useful, and covered in the plan-B section below.

The same mechanics decide which tours vanish first. Tours bundle a named entry ticket for their time slot, so a 9:00 departure on a popular archaeologist walk is competing for the same morning pool as everyone else — those slots go 5–7 days out in June–August while the 14:00 departure on the identical tour still shows seats. If you see your preferred morning slot alive 4 days out in July, that's the moment to take it, not to think about it.

Here is the asymmetry that settles the whole question: most guided tours on this site can be cancelled free up to 24 hours before the start, for a full refund. Booking a tour 7 days out therefore risks nothing — if plans change, you cancel on day 6 and pay zero. Waiting, on the other hand, risks the only thing that can't be refunded: availability. Under a 20,000-ticket cap, "I'll decide later" is a bet that 15,000 other people won't decide first.

So the working rule is book early, cancel if plans change. Lock the morning archaeologist slot the moment your dates firm up, even if the trip is still half-sketched.

Two honest caveats. First, free cancellation is a per-product policy, not a law of nature — bare ticket-only products are often non-refundable once dated, and a minority of tours use stricter terms. The exact policy is printed on each booking page before you pay; read that line every time. Second, a 24-hour policy means exactly that: cancelling at breakfast for a 10:00 tour is too late. Refund mechanics in more detail in the FAQ below, and the official-ticket side of this trade-off in official tickets vs tours.

It's 21:00 in your Naples hotel and Pompeii is tomorrow. In November–March, relax — book anything tonight or even at the gate. In April–October, spend ten minutes in this exact order:

If everything genuinely shows sold out tonight, run the plan-B ladder: afternoon slot → adjacent date → Herculaneum. And if a morning tour slot is showing at 21:00, book it now — same-evening availability in July has a shelf life of hours, not days.