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

Return flights

27 May - 03 Jun	SWISS
20 May - 03 Jun	SWISS
08 May - 10 May	KLM
18 May - 15 Jun	British Airways
26 May - 07 Jun	British Airways
11 May - 28 May	SWISS
03 May - 17 May	SWISS
19 May - 02 Jun	SWISS
04 May - 07 May	SWISS
11 May - 17 May	SWISS
28 May - 08 Jun	KLM
26 May - 02 Jun	KLM
20 May - 02 Jun	KLM
09 May - 17 May	SWISS
21 May - 03 Jun	British Airways
11 May - 15 Jun	KLM
11 May - 27 May	SWISS
06 May - 21 May	KLM
22 May - 29 May	Lufthansa
04 May - 25 May	KLM

Also check the deals for one-way flights from London to Perth 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 Perth in May from 983€

Return flights