I asked the question below, but of course I cover my own airfare and accommodation—and meals as well.

There it is again, lol—the complete lack of awareness. From a woman’s perspective, “I don’t want to go” isn’t really relevant to the situation. You’d probably get a much better response by offering to increase the allowance by the cost of the trip. She’d be happier, and she might be much more willing to put in the effort for an adult relationship... As I mentioned in my answer to your previous question, why not wait for her to say that she’d like to stay overnight or go on a trip?

Did you decide on the travel plans together with the woman? If the money is going toward flights and accommodations, don’t you think she may want a higher allowance?