Left Luggage at the airport is at the train station (actually, at the parking garage which is part of the same building), a very short walk across the street from the airport. The luggage carts available for free near the carousels in the baggage claim room can hold a lot of luggage and can go up and down escalators, so you do not need to seek out the elevators if you use them.Here is some information about the airport that may help you:
And, for the railroad station at the airport :Zürich Flughafen (Airport) Railway Station:
www.sbb.ch/content/sbb /en/desktop/bahnhof-services/am-bahnhof/standort/bahnh offinder.posid.3016.ht ml
I do not understand why they list "Luggage Pickup" in the list of services for the Rail Station," instead of "Left Luggage" as it is described at Zürich Main Station. The airport description calls it "Left Luggage."
Perhaps Arno can comment. Or, since you have lots of time, you could drop them a note if you wish clarification. My guess is a poor translation from German to English. The same office is used for drop off and reclaim, which are, in German - Gepäckaufgabe und Gepäckausgabe.
For Zürich main station -
In addition to the Left Luggage Office at the airport and also at Zürich main station, there are coin operated luggage lockers, accessible 24 hours per day, that can hold fairly large bags. You'll need Swiss coins. (Euros will usually work also, these days). The ones at Zürich main station take 9 CHF for a day. It may well cost more for larger ones at the airport .In June, which is not the high season, I'd expect some to be available. Luggage left in those lockers is transferred to the left luggage office after a certain number of days (72 hours) Your locker key + more money will get your baggage back to you.
I cannot comment on your international baggage transfers. Anything you learn will be helpful for me, too!
Don't worry about asking questions. We all learn from the discussions. Hope we can help.
Zurich to Kleine Scheidegg ( the station where you pick up the train for Jungfraujoch) is 3 hours 18 minutes by train. It takes 52 minutes each way to go up and down from KS to JJ. Trains run every half hour, and may be full at busy times, requiring a wait. If you pick a cloudy day, not uncommon in June, you will not see any scenery once you go up. The clouds have a tendency to come in during the afternoon, so, on average, it is better to be there in the morning.
Zurich to Geneva is 2 hr 44 minutes or 2 hrs 39 minutes twice per hour.