What is the least expensive route from US to Stockholm and on to Tallin for RS tour?
Ellen - When are you planning on taking your RS tour? I'm seeing fares from $1176-$1415 traveling mid June returning mid July from Charlotte to Stockholm. Have a look at kayak.com
Sorry, I willl go around the 8th or 9th of August and return the 22nd or there abouts.
The least expensive is probably flying both legs. Europe has a lot of low cost flying options. The best IMO is a ferry for the leg to Tallin from Stockholm. The archipeligo is worth seeing and the history of the area is built on traveling by sea.