What is the English translation of Si tu y arrives alors?

The literal English translation of "Si tu y arrives alors?" is "If you arrive there then?"

However, this phrase sounds a bit awkward in English. It's likely that the speaker is trying to express something like:

* "So, what happens if you get there?"

* "What will you do once you reach there?"

* "What happens when you get there?"

The exact meaning will depend on the context of the conversation.