Originally Posted by
bwiadca
It will be fine. Few times I did IAD-ZRH-DXB UA/LX with 6-7 hours connection time in Zurich. Never had to pick up the bags and they always arrived in Dubai on the same flight. So you should be ok. Even on my last flight Thai to LX BKK-ZRH-IAD we had around 5 hours connecting time. No problems with the bags.
It is not in doubt that it is fine to through-check bags for layovers up to 24h
when departing ZRH on LX.
Braswch however
departs ZRH on UA and while I am optimistic, I (and you) lack relevant experience for this scenario. If you originate in ZRH, you cannot check in bags with UA more than 3h before departure.