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

Return flights

08 May - 11 May	Lufthansa
08 May - 18 May	SWISS
11 May - 25 May	Lufthansa
24 May - 29 May	Air China
08 May - 20 May	Lufthansa
21 May - 25 May	Lufthansa
19 May - 09 Jun	Finnair
19 May - 26 May	Finnair
05 May - 19 May	Finnair
01 May - 22 May	Finnair
01 May - 25 May	Finnair
18 May - 01 Jun	Lufthansa
28 May - 11 Jun	Finnair
05 May - 04 Jun	Etihad Airways
25 May - 28 Jun	Lufthansa
08 May - 06 Jun	Air India
06 May - 05 Jun	Air India
16 May - 06 Jun	Lufthansa
31 May - 05 Jun	Finnair
19 May - 09 Jun	Singapore Airlines	direct

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 $606

Return flights