AirHint found the following cheapest return flights from London (LCY) to Castries (SLU) in October 2025 (see full year).

Return flights

30 Oct - 06 Nov	Delta
27 Oct - 05 Nov	Delta
29 Oct - 05 Nov	Delta
22 Oct - 18 Nov	Delta
22 Oct - 12 Nov	Delta
28 Oct - 13 Nov	Delta
30 Oct - 09 Nov	Delta
06 Oct - 16 Oct	Delta
27 Oct - 04 Nov	Delta
26 Oct - 05 Nov	KLM
31 Oct - 10 Nov	Delta
15 Oct - 28 Oct	Delta
02 Oct - 08 Oct	Delta
01 Oct - 08 Oct	Delta
01 Oct - 22 Oct	Delta
18 Oct - 30 Oct	Delta
13 Oct - 27 Oct	Delta
20 Oct - 27 Oct	Delta
14 Oct - 21 Oct	Delta
20 Oct - 29 Oct	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 $1125

Return flights