Further to previous poster's (Frank's) question, there is a little ambiguity which I ask the experts, (Tim, Larry, etc) to clear up for me.
The question is: can you enter Switzerland at one end of the country and leave on the other and have both journeys covered by the Swiss Card. That seems to be the question from the previous poster. I see the following statement in the details at the SBB site under "miscellaneous provisions" is:
"•The Swiss Card entitles you to one return trip between any Swiss border/ airport station and your destination on any line marked on the Swiss route map with a continuous line. You must complete the outward and return journey within one day and via the most direct route. See list of border / airport stations"
The words "one return trip" implies it must be a round trip, say from/to Zurich airport, and not from Zurich airport and to Chamonix or any other exit point.
In the "Details" section, the statement is:
"Journey to and from a Swiss border railway stations or airport to your vacation destination"
This implies any border crossing will do. Anyone have a definitive answer or personal experience using the Swiss Card?