In a medium saucepan, add cranberries, orange juice, honey, orange zest, and cinnamon. Stir to combine.
Bring to a boil over medium-high heat, then reduce to a simmer. Let cook for 10–15 minutes, stirring occasionally, until the cranberries burst and the sauce thickens.
Remove from heat and let the sauce cool completely. It will continue to thicken as it cools.
Transfer to a bowl or jar. Serve immediately or refrigerate until ready to use.