The Kiwi actor and his partner are currently quarantining in an Auckland hotel, and have been documenting their journey back to New Zealand on social media.
On Sunday evening Henderson posted a photo of himself having his temperature checked at the airport, telling his social media followers they were off to Aotearoa.
The couple have been dating since last year, and have shared their romance openly on social media - posting cooking demos together, and behind the scenes snaps from their dates.
Henderson has also previously received congratulations on his relationship from two former co-stars, Jennifer Garner and Ellen Pompeo.
Pompeo who played his love interest on Grey's Anatomy added in four red love hearts in support too.
In Henderson's latest TV role in the Netflix romantic soap, Virgin River, he plays Jack Sheridan, the love interest of Melinda Monroe, played by Alexandra Breckenridge.
Last month it was confirmed that a third season was on the way.