You may be quite right.That movie was filmed in Croatia though. White Lines was filmed in Mallorca so I wouldn't have thought travel was the issue.
I know though I was taken aback when I booked out of Los Angeles with Iberia. It was expensive; though I did end up cancelling... I think it's a more practical avenue from London, or if you're already in Europe somewhere.
The other part is I don't know where the film crew would be coming from. I could be that they're from Mallorca or Croatia like you're saying. I didn't know that.