HallowPretty sure Iceland has routing striaght to NA as well, though most players are routed through the UK when playing on NA servers or something.
There actually has been a fairly big project in the works for the last couple of years to connect America to Europe through Iceland, a string would be laid from Shirley, New York to Grindavík, Iceland, to the West Coast of Ireland with a branch going to Portugal.
Ping times between London and NY were expected at <65ms, round trip latency. The company behind it ultimately didn't manage to get the funding for it but just recently it got revived under a new name and backing from a new company. AEconnect, which I haven't really read anything up on so I'm not sure if they're doing the same route.