How to translate "If everything goes as planned..." For example

If everything goes as planned, we should have a successful journey.
I hope everything goes as planned tonight.


Specifically, I'm wondering if there's an idiom for this. If not, what's a more eloquent way of saying this?

What's usually used colloquially?
If everything goes as planned.
 如果一切按计划进行.

In daily conversation, we use "如果一切顺利" more often. 

(假若 is more often used in written language and is quite formal.)