Saint Lucia is a sovereign island country in the eastern Caribbean Sea, located north of Saint Vincent and the Grenadines and south of Martinique. Its capital city is Castries.
The official language of Saint Lucia is English, but a French Creole called Kwéyòl is also spoken widely. The currency used in Saint Lucia is the Eastern Caribbean dollar (XCD), which is shared by several other countries in the region. The XCD has a fixed exchange rate of 2.70 to the US dollar.
The flight time from the UK to Saint Lucia varies depending on the airline and route, but it typically takes around 8 to 10 hours. Many major airlines offer direct flights from the UK to Saint Lucia, including British Airways and Virgin Atlantic.
The local time in Saint Lucia is Atlantic Standard Time, which is four hours behind Greenwich Mean Time (GMT). However, the country does not observe daylight saving time, so during the summer months in the UK, it is five hours behind GMT.
The main airport in Saint Lucia is called Hewanorra International Airport, and its address is: Hewanorra International Airport, Vieux Fort, Saint Lucia.
Note: There seems to be a typo in the question as it refers to "Saint Lucia and Nevis", but Nevis is actually a separate country from Saint Lucia, as stated in the previous question about Saint Kitts and Nevis.