AirHint found the following cheapest return flights from London (LCY) to Castries (SLU) in October 2026 (see full year).

Return flights

12 Oct - 20 Oct	Delta
09 Oct - 20 Oct	Delta
13 Oct - 20 Oct	Delta
05 Oct - 03 Nov	Delta
15 Oct - 22 Oct	Delta
05 Oct - 13 Oct	Delta
05 Oct - 19 Oct	Delta
08 Oct - 18 Oct	Delta
09 Oct - 19 Oct	Delta
12 Oct - 19 Oct	Delta
20 Oct - 27 Oct	Delta
30 Oct - 08 Nov	Delta

Also check the deals for one-way flights from London to Castries in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Castries in October from $2116

Return flights