Is it better to do a voluntary Hajj or to donate to the mujaahideen who are fighting for the sake of Allaah?

Praise be to Allah.

Both travelling for ‘umrah and spending for the sake of Allaah are good deeds, but the benefit of ‘umrah is limited to the one who does it, whereas the benefit of spending on jihad is more far-reaching, so spending on that is more appropriate and takes precedence. 

And Allaah is the Source of strength. May Allaah send blessings and peace upon our Prophet Muhammad and his family and companions. End quote. 

Standing Committee for Academic Research and Issuing Fatwas 

Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allaah ibn Baaz, Shaykh ‘Abd al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allaah ibn Ghadyaan.