Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to Belize City as you normally would.
You don't need a visa for Belize if you hold a multiple-entry visa or valid residence permit for the United States or Canada, or hold a valid multiple-entry Schengen visa.
Returning to Northern Ireland from Belize City
COVID-19 testing requirements
Visitors from Belize City are not required to present a negative COVID-19 PCR test or antigen result upon entering Northern Ireland.
Visitors from Belize City are not required to quarantine after entering Northern Ireland.