AirHint found the following cheapest return flights from London (LCY) to Singapore (SIN) in May 2026 (see full year).

Return flights

20 May - 08 Jun	KLM
15 May - 31 May	SWISS
31 May - 07 Jun	SWISS
14 May - 17 May	SWISS
05 May - 10 May	SWISS
20 May - 25 May	SWISS
07 May - 20 May	SWISS
06 May - 20 May	SWISS
17 May - 31 May	SWISS
18 May - 31 May	SWISS
11 May - 28 May	SWISS
11 May - 27 May	KLM
19 May - 22 Jun	SWISS
22 May - 26 Jun	SWISS
15 May - 19 Jun	SWISS
17 May - 11 Jun	KLM
25 May - 01 Jun	SWISS
25 May - 06 Jun	KLM
23 May - 15 Jun	KLM

Also check the deals for one-way flights from London to Singapore in May.

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 Singapore in May from $695

Return flights