Having been ground for medical reasons for the past six months I am now trying to get some trips booked. I have to go to the US in August, and usually look for the best deals in J from a variety of European starting points (LON (all), MAN, DUB, AMS etc). In the past I have just plonked a list of airport codes into matrix and then picked an itinerary from the results.

Now it seems that one cannot search with starting points in more than one country! Is there another tool that can be used to do this all in one go, or do I just need to get busy with multiple individual searches?