None of your suggestions are quite right:
'Hey' is a very informal way of attracting someone's attention. It's not appropriate for this situation, and if you said this to a fellow passenger it could be seen as rude. Conversations with strangers start with an 'Excuse me', not a 'Hey'.
By contrast, 'sir' is over-formal. We don't normally use 'sir' unless we have to. The flight attendants would address the passengers as 'sir' or 'madam' because they're required to as part of their job, but passengers wouldn't address each other in this way.
None of your expressions with 'pass' work either, unfortunately. You could say something like 'Excuse me, could I just get out/ get past you?', but in reality nobody ever gets as far as asking a complete question. To be honest, the only thing you need to say is a polite 'Excuse me' or 'Sorry', accompanied by the appropriate body language of preparing to stand up, and other passenger will always get the message. Or failing that, book an aisle seat?