The airlines would not be subchartering other airlines aircraft if they didn’t have to. They would much sooner operate their own aircraft to maintain commanality, and to save on costs.

I can only assume that aircraft have had technical problems, and they have had to bring in cover. Unless they are operating extra flights like Luke says because of the end of the season, I don’t know.

Tommyinyork – You seem to ask this question everytime charter airlines have to bring in a few subcharters… Had a quick look and found two threads started by yourself about subcharters! Its just standard practice when necessary for airlines, and can be for a variety of reasons.