Iliad IV says Hera & Athena are helping Menelaus; Athena does save him specifically from Pandarus' bowshot (one of the many lovely epic similes), but both of them are generally pro-Achaean, so they'd be pro-Menelaus anyway. Hera mentions that both Mycenae and Sparta are particularly beloved to her, so presumably Menelaus has been sacrificing to her for basically all his life, but I can't remember textual evidence for her showing him particular favor.