Ardern said requiring people to stay in their rooms would be "another layer of protection".
The Prime Minister said the issue of charging people for quarantine in the hotels is a complex issue that the Government is actively looking at.
Ardern said for anyone looking to go overseas, especially ahead of the school holidays, it isn't fair for taxpayers to pick up the tab for their return so the Government is looking into its options as to how to charge them for border facilities.
"One message I'm sending clearly to New Zealanders though, for anyone considering a non-essential trip, we will be looking at whether or not you end up being charged on your return, because you have choices. I accept that some will have essential reasons, but for others, it's just not fair to expect New Zealanders to pick up the tab on that," the Prime Minister said.
"My view is that if you're making a choice to go on a holiday offshore, with the expectation that taxpayers pick up the tab on your return, that it's right for us to look at whether or not we can deal with that."
Ardern said people travelling overseas for holidays put "extra pressure on New Zealanders who need to come home".
"You actually have a choice on whether you leave or not," she said.