With so much time on your hands, I’d consider throwing in the Baltic states and Berlin as well. Helsinki and Tallinn are linked by cheap ferries.

30 days for 9 countries? (DK, S, SF, N, EST, LTV, LITH, PL, D)?

I really disagree. There's a lot of diversity in each of the Scandinavian countries, and tons of varied sights there. Plus distances aren't short.

Agree with timing due to earlier spring in the south. The Swedish leg could go south from Stockholm via Norrköping, Söderköping, Kalmar, Karlskrona to the Skåne province (Ystad and many smaller places) ending in Malmö.

There you could branch out to Denmark (check with the Danish forum for suggestions) with places like Roskilde, Copenhagen (of course), Odense, the west cast of Jutland and north to the top where you could take the ferry to Gothenburg and continue up to Norway.

As for Finland we did a great roadtrip last summer in the southern parts. Starting in Helsinki you could go east via Borgå, Lappenranta, Punkaharju (lovely nature area near lake Saimen), Savonlinna (great castle), Mikkeli, Häämenlinna (again great old castle), Tampere (beatiful industrial city with rapids) and last Turku (Åbo).

Thank you!

Amazing suggestions thank you. At the risk of a long post my AI generated itinerary was as follows:

Day 1-3: Helsinki, Finland

  Day 1:

   • Arrive in Helsinki.

   • Explore Helsinki Cathedral, Esplanadi Park, and Market Square.

  Day 2

   • Day trip to Nuuksio National Park for hiking.

   • Visit Löyly Helsinki for a traditional Finnish sauna experience.

 Day 3:

   • Take a ferry to Suomenlinna Sea Fortress.

   • Explore the islands and enjoy a picnic

Day 4-6: Stockholm, Sweden

 Day 4:

   • Take a morning flight or overnight ferry to Stockholm.

   • Explore Gamla Stan (Old Town) and visit the Royal Palace

 Day 5: Stockholm Archipelago

   • Full-day boat tour of the Stockholm Archipelago, stopping at various islands for walks and local experiences.

 .

  Day 6: Day Trip to Sigtuna

   • Drive to Sigtuna, Sweden’s oldest town, for a charming historical experience and scenic walks by the lake.

Day 7-9: Gothenburg, Sweden

 Day 7: Drive to Gothenburg

   • Pick up a rental car and drive to Gothenburg.

   • Explore the city center and Haga district.

 Day 8: Archipelago Adventures

   • Day trip to the Southern Archipelago for exploring local life and small islands..

 Day 9: Adventure Day

   • Try an activity like kayaking in the Gothenburg Archipelago.

Day 10-13: Oslo, Norway

Day 10: Drive to Oslo

   • Drive from Gothenburg to Oslo.

   • Explore the city center and Aker Brygge.

Day 11: Oslofjord

   • Boat tour of Oslofjord with stops at islands.

 Oslo.

 Day 12: Local Living

   • Visit a local market and cook a meal at your accommodation or have a picnic in a park.

 Day 13: Adventure Day

   • Try an activity like zip-lining or a high ropes course at Oslo Sommerpark.

Day 14-17: Bergen and the Fjords, Norwa

 Day 14: Scenic Drive to Bergen

   • Drive from Oslo to Bergen through picturesque landscapes.

   • Explore Bryggen and Fløibanen funicular..

   Day 15: Fjord Adventure

   • Day trip to Nærøyfjord and Aurlandsfjord.

   • Flåm Railway experience..

 Day 16: Coastal Exploration

   • Visit the Bergen Fish Market and take a coastal drive.

 Day 17: Adventure Day

   • Try an activity like RIB boat tours on the fjords.

Day 18-21: Copenhagen, Denmark

 Day 18: Travel to Copenhagen

   • Fly or take a train/ferry to Copenhagen.

   • Explore Nyhavn and Tivoli Garden.

 Day 19: City and Coastal Exploration

   • Visit the Little Mermaid and take a coastal walk.

   • Lunch at Torvehallerne Market.

 Day 20: Day Trip to Møns Klint

   • Drive to Møns Klint for stunning cliffside walks and a bit of adventure..

 Day 21: Local Living

   • Visit a local market and cook a meal at your accommodation or have a picnic in a park..

Day 22-24: Aarhus, Denmark

Day 22: Drive to Aarhus

   • Drive or take a train to Aarhus.

   • Explore the Latin Quarter and Aarhus Cathedral..

 Day 23: Adventure Day

   • Try an activity like mountain biking in Marselisborg Forests..

Day 24: Day Trip to Djursland

   • Explore the natural landscapes of Djursland, including national parks and coastal areas.

Day 25-28: Return to Stockholm and Helsinki

Day 25: Travel to Stockholm

   • Drive from Aarhus to Stockholm.

   • Return the rental car in Stockholm..

 Day 26: Stockholm to Helsinki by Overnight Ferry

   • Morning and afternoon exploring any remaining sights in Stockholm.

   • Board the overnight ferry to Helsinki in the evening.

  Day 27: Arrive in Helsinki

   • Arrive in Helsinki in the morning.

   • Explore more of Helsinki or revisit favorite

 Day 28: Final Day in Helsinki

Not much of Finland in that so I didn't know what needed changing or if AI has nailed a suitable itinerary?

That AI generated plan misses so much. For example, Haga in Gothenburg is basically one street that MAY be interesting but is WAY over-rated. The Stockholm section makes no mention of the Vasa Museum, which was a highlight of my last trip to Stockholm. I think some good old-fashioned guide books would work better than AI.

Good to see Møns Klint, it really is unique place, and Møn is also really nice - include Liselund Park, Nyord village, and one of the frescoed churches plus Stege town, the only hub, there.

You should go on a canal tour in Copenhagen too. Another unique experience there would be the tower of the Church of Our Saviour.

Ørstedsparken is a nice park for a picnic. It is just next to Torvehallerne. I'd choose that rather than the Botanical Gardens or Kongens Have, though they're nice too.

There are so many questions when reading that plan. Some part suggest driving but other public transportation and why Bergen to Copenhagen in one day - only sensible if youre flying. Public transportation for longer travel and pick up a rental car in 2 or 3 spots for more leasur travel this will give more time to see little villages and some walks.

Spring will arrive earlier further south so consider Denmark first and Norway last.

Even with chilly weather the Fjord region of Norway should be a highlight consider adding a day or two.

Lots of cities (7) maybe only 5 to have more time for nature and quaint villages.

If you still consider a rental car Stockholm- Stockholm I would recomend Sweden - Denmark and then ferry to Norway.

Sey kayaking is great by the way by the sea will still be very cold - possible with good clothes but many would consider May a bit early. 2024 we had freezing temperatures some nights in May - that was colder than usual but come prepared.