So when is the cheapest month to travel to Belize? September Is Typically the Cheapest Month to Visit BelizeHistorically, September is the most affordable month to travel to Belize. Sometimes flying into Cancun or Chetumal and crossing into Belize can save a little money—though it adds more travel time. Travel Hacks to Save Even MoreAside from flights, there are a few smart ways to stretch your Belize travel budget—especially if you’re visiting in the off-season. Travel Smart and Save Big in BelizeIf you’re looking to visit Belize without spending a fortune, September is your month.