I would like to have a shapefile with the airports position and the routes of the planes I've found Openfilghts but I can't use it in QGIS.
Seems that the format of the DB
.dat is not supported by QGIS.
How can I overcome this problem?
I tested it with the first dataset from the website (airports) using QGIS 2.0.1 on Ubuntu machine. Opens without any issues using 'Create layer from delimited text file'.
Detailed instructions on how to do that are in the manual (bottom of the page).
For airport data - choose