I can vouch for the fact that Virgin Atlantic don't censor their in-flight movies. I was quite surprised at first as I was flying to Orlando on vacation, and American Pie was showing without any cuts. The plane was 50% children, and was surprised but I prefer it this way. Virgin do mention in the Inflight guide that they may not be suitable for children, anyway most kids will sit and play with Super Nintendo Gateway system instead, Unless they are on one of the older planes.
One ironic flim that was shown in its entire version with some very strong language (C words too!) was 'Snatch'. The title itself has a strong slang meaning in the UK!
Thanks,
Richard