3 weeks - Finland and the Baltics - itinerary feedback please

I've been to Helsinki and Tallinn, but not Riga or Vilnius. They are absolutely worth seeing - I loved both places - but I'm doubtful that either Helsinki or Tallinn warrants five nights, even at a leisurely pace.

I had four nights in Helsinki and took one day trip to Turku and Naantali. I'd recommend doing that, but give yourself enough time in Naantali to really enjoy it. (I didn't get there until too late in the afternoon.) There are undoubtedly other worthwhile day trips, but you might find yourself ready to move on after three or four days.

I only spent one night in Tallinn, arriving early morning on the ferry from Stockholm, and leaving late afternoon the next day on the ferry to Helsinki. I saw a lot in that amount of time. I explored the old town very fully, took a city bus out to the Song Festival Grounds, and walked from there to Kadriog Park and spent a few hours at the Kumu Art Museum. I wasn't rushed at all.

Personally, with 20 nights, I'd cut at least a day off each other destination and spend the first 4 or 5 nights in Stockholm. Especially as a lover of the arts and architecture and history. There's so much of all of that there.

I don't think you'll feel rushed adding a fifth destination with the time you have, but you should gauge what is best for you.

Have a great trip!

I really liked the low-key vibe of Helsinki, but 5 nights would be a stretch. Maybe fill in some time with trips to Turku or Porvoo.

Same thing with Vilnius. A gem of a city, but I couldn't imagine spending more than 3 nights there.