To be honest, outside school holidays direct flights on BA and, to a lesser extent, Virgin are very similar to flights with connections. Fares to Orlando/Tampa can be had for under £500 (and sometimes less than £400 in the sale!) The problem is that BA only fly internationally from London so if you're in other parts of the UK it still means a connection or a very long drive. Judging by your address, that isn't going to be a problem for you.
I don't know enough about school holiday fares to make a useful comment.
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