I think we also need to remember the 'Trump effect' on loads to the US, and indeed prices. Costs to East Coast are often cheaper than flights to the Med this summer...can't be too profitable...BAD! [Said in Trump twitter-esque style]
I'd say it's more due to the fact that our continent is becoming a terrorist wasteland that's having a greater affect on transatlantic loads. Certainly I've never met anybody that has stopped traveling to the USA because of Trump, I certainly haven't.