Any process that activates or increases the frequency, rate or extent of the directed movement of iron ions from one side of a membrane to the other by means of some agent such as a transporter or pore.
Synonyms:
exact_synonym:
positive regulation of iron ion membrane transport; positive regulation of transmembrane iron transport; up regulation of transmembrane iron ion transport; upregulation of transmembrane iron ion transport
narrow_synonym:
activation of transmembrane iron ion transport; stimulation of transmembrane iron ion transport