Skipping Airail Segment
Some friends of mine are visiting me in June. They will be flying into and out of STR with the first leg on the return being a train from Stuttgart to FRA.
Since from where I am it is quicker to take other ground transport to FRA than via Stuttgart, how does Lufthansa handle missed Airail segments? Do they count as a no-show and hence the rest of your itinerary is cancelled? Or are they safe to skip?