We will be doing Scandinavia tour late next spring. Looking very much forward to it! Looks like flights from Bergen, where the tour ends, are very early for same day connection to US. We are thinking of flying to Amsterdam or another European connection city, staying a night or two, and then flying from there. We are in Louisville, so we always have a connection in the states, usually Newark or Chicago. Any thoughts?
Since the tour only does the cruise part of Norway in a Nutshell, and in case the weather wasn't great that day (turned out it was good), I opted to do the NiaN from Bergen to Oslo and caught a flight from there.
You can do whatever you want after the tour. There is not rule that you have to return home right when the tour ends.
You could, technically, go anywhere you want. If you have the time, why not spend more of it in Europe since you are "already there."
If it were me I would look for a discount airline flight 90 min or less to a place that interests me and has good priced connection home as part of my RT ticket at the start of the tour; then stay as long as possible.
Some airlines offer free stopovers in their connecting cities. For example, Icelandair allows up to 7 days in Iceland.