How long does the Last Supper visit take?

How are you travelling? You'll be out on the street by 10 am for sure. If going by train, they leave hourly from Centrale at 10 past the hour for a 48 minute trip. They also have hourly Trenord trains from Porta Garibaldi at 31 past the hour for a 67 minute trip. Take the Metro "green" line from Cadorna to P.G. station.
I you have a car, no sweat.

Thanks! We don't have a rental car, so we'd travel to Bergamo either by train or by taxi/hired car. I'd looked at trains from Centrale, but not Porta Garibaldi, so thank you for that idea, as well. A train from there looks like the better option if we're finished with the visit by 10 a.m.

Assume you can catch the 10:31, You can buy your ticket at Cadorna station on your way to the Last Supper to save a little time when you get to P.G. If your sweating bullets, you can grab a cab to P.G.

Good idea on getting the tix on the way - thanks! Now I just have to wait and see if AC Milan wins its appeal of the "closed doors" punishment. I wouldn't even be looking to go to Bergamo for the Atalanta match on 10/20 if there wasn't the very real possibility that the ban on spectators at the 10/19 AC Milan match will be carried out. One way or another I am determined to see a Serie A match while I'm in Italy!

I hope you'll have some time to check out Bergamo itself. The upper town (Citta' Alta) is charming.

15 minutes? They really give you the bums rush. Probably don't want you to have more time lest you decipher "the code".

We were just there. They only allow you 15 mins.

Seems to my weak memory that while seeing the Last Supper is only 15 minutes, there were two "chambers" before the art that we waited in for 15 minutes each....making the total time 45 minutes. Again, my memory is not the best, but I am thinking your 9:30 visit will get you back on the street at 10:15 at the earliest....if you leave without buying a postcard or other souvenier or using the convenient bathrooms.

Just closing the loop here... Our visit started shortly before our 9:30 a.m. appointment and we only spent a couple of minutes each in the two antechambers before being allowed in to view The Last Supper for the allotted 15 minutes. The whole visit was over by 9:50 a.m., though still worth it. Thanks to everyone who provided information!

I assume you made the match?

We went to the AC Milan match the night before (the ban on fans at the match was lifted), so we didn't try to go to the Atalanta match after The Last Supper visit.