BA and Easyjet fly the route direct but I think they're the only carriers that do. Given the short flight, there won't be much difference but BA might feed you and transfer your baggage to the Virgin flight which Easyjet definitely won't do.

Have you thought about flying direct to New York on Continental and connecting from there to Orlando? The 'door to door' time is the pretty much the same as the Virgin option in both directions and when you fly home you won't have to connect from London after a long transatlantic flight.

If you aren't flying until next summer I wouldn't bet my house on BA still having a domestic network by then if the last few years is anything to go by.[msnmad]