The airline said the move followed a recent network review.
“The proposed changes mean we will increase flights from London Gatwick to Antigua, boosting services from three per week to four per week, from 8 June 2020,” the airline said in a statement.
“Our Havana service will also move from Gatwick to Heathrow and will remain the UK’s only direct scheduled flight to Havana.
“The service will move onto the A330-300, increasing Upper Class capacity by 63% and will open up more hub connections from across the UK.
“Unfortunately, this means we will cease flying to St Lucia for the foreseeable future.