It's possible to import flights without GPS tracks with a simple "csv" file.

The file format is Parawing site export file format.

The file must contain seventeen fields, filled or not.

Date                    [required]    Format DD/MM/YY or DD/MM/YYYY
Take off site        [used]
Landing site
Paraglider  [used]
Type of flight
Duration              [used]       total minutes
Distance
Launching conditions    [used in Comment]
Flight conditions            [used in Comment]
Landing conditions        [used in Comment]
Max Altitude
Point bas
Max gain
Total gain
Turnpoints
Coaching
Compagnons de vol
Take off time            [used]        Format HH:MM

If the last field "Take off time" is empty, Logfly put 12:00

Header row is not required.

If you use Excel, don't put delimiters and each entry must be separated by a semi-colon.

An example : 

   03/05/12;Planfait;perroix;Asterion;Vol local;89;0;;;;0;0;0;0;;Ecole;14:30;
   14/05/12;Montmin;Doussard;Omega 12;Grand vol;49;0;;;;0;0;0;0;;Ecole;13:30;