Is it even possible to build Frankfurt Airport in Minecraft?

Is it even possible to replicate Frankfurt Airport 1: 1? I have already drummed up a team, but I somehow have the feeling that 4000 blocks is only for a long runway.

The worlds are infinite but I doubt whether the server can do that

It is possible to have to work long hours and have a lot of patience. Rich in space

To what extent? So a flat world is 60x60 million blocks big a block = 1 meter, that is definitely only very time-consuming.

With a bit of time, commands or better Worldedit the whole thing should actually be done, I just don't know how detailed you want to be:-)

Easily done in 1-2 weeks with worldedit