If the right to abortion is deemed an important right to protect at federal level then Congress should have the courage to legislate.

I am not a lawyer at all but looking at descriptions of Row v. Wade the feeling I have is that the Supreme Court of the time wanted to rule in favour of abortion rights and stretched the Constitution as much as it could in order to justify its decision, which is why that decision has always been under attack, IMHO.

This is an eminently political issue and thus it calls for a political decision by Congress (assuming they do want a federal law on this...)

In the meantime, an 'industry' will develop in 'liberal' states for those who can travel to them.