Hello. We are traveling ATH-ZRH-SFO in Business in May. Both flights are coded as LX flights, though the ATH-ZRH sector is operated by A3. We have a 3hr layover in ZRH. Note: Ticket stock is 016 (United) because our outbound flight 10 days earlier is SFO-FRA. A couple of questions:
1. Can we do online checkin, and if so, would that be with LX or A3? Will this check us in for both flights?
2. At ZRH, should we expect to go through immigration and/or security?
Any additional suggestions welcome.
Thanks very much.