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

Return flights

15 May - 17 May	SWISS
06 May - 20 May	British Airways
05 May - 12 May	British Airways
05 May - 19 May	British Airways
11 May - 08 Jun	British Airways
05 May - 10 Jun	British Airways
05 May - 20 May	British Airways
26 May - 11 Jun	British Airways
08 May - 11 May	SWISS
18 May - 26 May	SWISS
12 May - 26 May	SWISS
11 May - 25 May	SWISS
11 May - 18 May	SWISS
29 May - 01 Jun	KLM
25 May - 07 Jun	KLM
29 May - 08 Jun	KLM
11 May - 01 Jun	KLM
13 May - 01 Jun	KLM
31 May - 14 Jun	KLM
27 May - 14 Jun	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 915€

Return flights