Constitutionally speaking, the federal govt. does have jurisdiction to enforce this law.

What I want to know, is what happens when a state [where abortion is outlawed] makes a law forbidding any kind of corporate, insurance, or charity type entity from funding travel or medical costs to individuals for the purpose of committing [illegal in that state] abortion?

In that case, I do not see how those corporate entities could legally pay for an individual to cross state lines, considering they would be funding something that is illegal. Because, the act of making that payment would be a crime within the state jurisdiction.

I may not be explaining my point very well, but I hope that anyone reading gets my point. Basically, an individual could cross state lines to commit abortion, but that individual cannot get paid by their employer, or insurance operating within the state where abortion is outlawed to do so.