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

Return flights

20 May - 31 May	Lufthansa
15 May - 31 May	Lufthansa
21 May - 31 May	Lufthansa
25 May - 01 Jun	KLM
12 May - 19 May	KLM
18 May - 29 May	KLM
17 May - 24 May	Lufthansa
21 May - 22 Jun	KLM
08 May - 24 May	SWISS
22 May - 29 May	KLM
08 May - 29 May	KLM
22 May - 31 May	KLM
30 May - 11 Jun	KLM
29 May - 26 Jun	KLM
21 May - 05 Jun	ITA Airways
21 May - 07 Jun	KLM
22 May - 07 Jun	KLM
18 May - 07 Jun	KLM
23 May - 07 Jun	KLM
21 May - 01 Jun	SWISS

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 $847

Return flights