If only, it was this simple as, to send a airline an message, SAS for example, and just say: Hey, I like your airline, and want to add it Into this game, because then I can relate even more to it, can I do?
In the best scenario, airline will charge you for some fee to use their logo and design, in the worst scenario, they refuse it and they will start legal procedure since you already contacted with them. In between both, they will just ignore it and they will never send a reply to you. As @letsdothis41 said while I wrote this.
The best case is not involving any game studios and airline companies.