Hi , i write down all airlines witch are in A-CEO ! Maybe they are not complete , but the most are in.
here you find the link to that list 
(in Trello at description) Trello
here you find it also in the forum: List: All real airline mods for Airport CEO
I hope that helps to do things not twice
Also all mod from ACEOMM and from the ACEO Modding Group are in that list , but also all other real airlines i found.
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