No, I'm not.
I'm trying to find an actual false representation, and seeing only a false inference of intent to use every leg of travel from a representation of intent to purchase a ticket; testing this as fraud is something which you seem to admit would see every purchase of an aggregate good or service (the example you specifically addressed elsewhere in the thread being fast food value meals) priced below the price of some proper subset of their components as actionably fraudulent (if not always worth the effort) if the intent was not to use every purchased component but only to save money compared to individually purchasing the components.
The false representation is "I intend to fly to city B." That's it. Nothing else. It's not "I intend to use all components of a series of segments that would get me to city B" as you suggest.
You're making the analysis more complicated than it is, and that's why you would fail to persuade a court.
You're trying to find a loophole that, as a former Federal court intern, I find extremely unlikely to persuade any reasonable judge. When you declare your destination to be ILM in the search field, one can reasonably infer that your intent is, in fact, to travel to ILM. I concede that there's no case law yet on this subject, but I would be surprised if it made it out of the "laughed out of court" stage if you argued otherwise.