 If you liked
Last Exile
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 ...then you might like
Bounen no Xamdou
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seems to have a similar setup going on from the first episode i've seen. carries a strange technology in a world revolving around that of airships.
Airspace, adventure, action and a great base story. The main characters have their own ideals intertwining in a world of conflict. The scenery is similar, while the theme is different. Both anime's are easy to watch and have a great adventure in-store.
Last Exile and Bonen no Xamdo share a similar sort of flying-ship style, as well as the broad sky travel theme in general. There are also a few scenes that bear some similarity to Last Exile's universe, such as the group of white-haired children.