Has Batman ever traveled to a different universe where his parents

Write it up, send it to DC, I'd read it

I guess this would also mean that he'd have to travel to universes where that one bat doesn't fly into his house to throw bats through the window. Just to make sure.

There was a story where Batman travelled to the past and had a choice to stop his parents' murder at the cost of no Batman in that timeline. He decided to do it anyway and in the end Young Bruce became Batman anyway as a homage to the man who saved his parents.