Ep, I do want to really encourage you. Divorce is cr@ppy for a reason. You may not win this one, but you will get to make your trip, just not under your preferred conditions. But that doesn't mean anything other than that your H's inflexibility is inconveniencing his child and over time, if that's his regular position, it will be visible to people what his selfishness costs. With luck that pressure will cause him to be more amenable to requests in the long run.
I'm sorry you're going through this but I hope you still find a LOT to be grateful for on Thanksgiving Day.
Me42, H40 D12, S8, S7 A revealed: 7/13 Sep 4/14; Agreed to D 1/15