Last Supper Tickets

If you can book a tour with tickets do it
The tour is well worth it

It’s probably something lost in translation but sounds like the 25 euro purchase would be both tour and ticket
Haven’t looked at their website but that is how I would read it

You can call them during open hours Italy time

If you tell us your date we can offer more specific help

Hi, Giangilberto from Milan, so before getting to the point I can tell you that the ticket for the Last Supper by Leonardo da Vinci is one of those that I believe is one of the most scammed in Italy, the most counterfeit ticket you could find if you do a Google search maybe tickets ranging from 60-70-80 euros.
My advice is to go only and exclusively to the official website of the Last Supper by Leonardo da Vinci which from there will redirect you to the official reseller which is Viva ticket. Now I'll give you the link.

https://cenacolovinciano.org/en/

https://cenacolovinciano.vivaticket.it/index.php

https://cenacolovinciano.vivaticket.it/index.php?nvpg[sell]

The last link I gave you is the one regarding the tickets for the tours you indicated in your question on this page. If you look, it actually says that the €25 fee includes both the entrance ticket and the guided tour, €15 entrance and €10 guided tour.
It could happen that there are later slots that perhaps are returned by tour operators who don't use them and are free. The advice I can give you is to check periodically maybe even once a week the official website, and maybe you will find a free slots.
Look, the last time I was there was two years ago. I took a private tour from a reseller and I paid €50 each. There were two of us, we spent €100. However, for example, from this reseller, we had a great experience. It was worth it because the guide was very, very good, both in terms of knowledge and in how he explained everything. So, the experience was very beautiful. The advice I give you is also to do it with a guide because entrances to the Last Supper are limited. Due to the fact that it is a unique work in the world, it is not even a fresco, it is actually painted on the wall.
The work has serious deterioration problems so to preserve and protect it, entrances are limited, only a few groups enter and can stay inside for no more than 10-15 minutes, it ends immediately.
A guided tour gives you a whole explanation before entering and even when you leave he will give you other explanations that make everything much more interesting.
The last thing I can tell you, since I'm from Milan, so as far as trying to call them or write there might be some problems for you regarding the time zone or maybe even the language. If you want I can call them and ask them for the information you need.

Our experience in 2024 was much like your own. I sat at my computer waiting for the instant tix became available and…they were gone! I think tour companies using bots snatch them up. We held our noses and bought a guided tour only to have the company change the date two weeks before our departure. We would not be there on that date so we cancelled, got a refund and booked with another company for even more $. Was it worth it? A qualified yes. It was a bucket list item and at our age it’s unlikely we will return. It is, as noted above, in very sad shape despite restoration. So, be prepared to shell out some Euro or not see the Last Supper.

Thank you all for your responses to my questions. I thought I'd share a little more information about our trip which might explain our concern about the Last Supper tours. My wife and I are traveling to Amsterdam on 10/30, arriving the following day, and embark on 11/3 on an eight-day Viking Rhine River cruise to Basel, Switzerland (our first). We have several options after the cruise which are, 1) taking the train to Milan on 11/10 and flying home from there on 11/16. I have very discounted lodging booked for six nights there at the Hilton Milan (two blocks from the centrale train station) that can be cancelled 48 hours before arrival, or 2) stay in Basel/Zurich/Lucerne for a few days and then go to Milan from there, or 3) we have also thought, because of the low hotel rates, take several potential day/overnight train trips from Milan to Lake Como, Venice or Florence, or even changing the hotel booking and taking the train to Venice or Florence for 2-3 days. Our last night at the Hilton is on the 14th and our last night in Milan is at a hotel at the airport on the 15th. I think our best use of time would be to book the Last Supper tour on the day of the 14th, which would also allow time for the Duomo and other nearby sites. Not having visited the area, we have also thought about spending all of our time there exploring Milan, although we have been advised that most of the primary sites can be seen in just a few days. Much of the above is still up in the air because of what we've read about November weather in those places. I would appreciate any thoughts or suggestions you may have on any of it. Thanks.

Jim

Another option is to wait until the Wednesday (12:00 PM Italian time) the week before your visit when they release a limited number of tickets to the public that were not released in June. Maybe this Wednesday, log in to the official LS website (as Giangilberto suggested) at 12p Italian time to see how many tickets get released and how fast they are scooped up. It'll give you an idea if wating until the week before is a viable option or not.

Jim, We’re in the same boat. We’ll be in Milan in October and I didn’t realize they released the tickets in June. I’m too cheap to pay four or five times the cost of the ticket for a tour I don’t need or want. So that leaves us with looking for a ticket released at the Wednesday noon ticket release for the following week. I got up at 3:00 am here on the West coast (U.S.) to see what they released. Tickets were available every day of the following week, but I didn’t choose a day to start a purchase and see how many tix were available. But it looks like a promising way to get tickets. Good luck.