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Booking with British Airways 51 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Castries. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, the most affordable month to book a British Airways flight from London to Castries in October, with an average price of £393. Conversely, traveling with British Airways from London to Castries in December will be the most expensive, with an average cost of £615. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
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