Who says you need to fly to France for those charming French streets, boulangeries, patisseries, historic buildings, and the pastoral countryside? Quebec was...
Videos are too heavy for my connection, but I take it from the comments that this is really about reaching franophones on the continent. Lousiana supposedly has some French speaking parts.
Anyway, just wanted to mention there is a bus that goes from London to New York, the long way around via Russia. Takes a month IIRC. But I guess traversing Russia would be a show stopper for many.