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

Return flights

07 May - 18 May	Lufthansa
16 May - 20 May	Air China
16 May - 01 Jun	Air China
15 May - 08 Jun	SWISS
07 May - 21 May	Finnair
04 May - 03 Jun	Lufthansa
04 May - 13 May	Finnair
06 May - 21 May	Lufthansa
03 May - 07 May	Etihad Airways
07 May - 14 May	Finnair
08 May - 22 May	Finnair
01 May - 15 May	Finnair
21 May - 28 May	Finnair
22 May - 12 Jun	Finnair
22 May - 07 Jun	Finnair
29 May - 05 Jun	Finnair
17 May - 01 Jun	Gulf Air
17 May - 01 Jun	Singapore Airlines	direct
16 May - 01 Jun	Singapore Airlines	direct
22 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 $638

Return flights