Tamra posted a photo to Instagram of the three Bravolebrities, with a tell-tale caption: "Last three standing.”
The Housewives headed to the tropical location, where Heather has been filming scenes for the CBS cop drama Hawaii Five-O.
Tamra and Vicki flew out to see her after she wrapped up the show on November 5.
"It's a wrap!" Heather captioned a collage of photos of herself from the show's set. "Now off for some fun with @tamrabarney @vgunvalson in Hawaii! #RHOC."
Later, Heather posted a photo of herself with the two women, which she captioned: "Having fun in Waikiki! @tamrajudge @vgunvalson #RHOC."
And Tamra tweeted on November 5, "Good morning. Up early and it's not to work out! Headed to Hawaii with @vgunvalson @HeatherDubrow . #H50 #Bravo #rhoc #season9."