AirHint found the following cheapest return flights from London (LTN) to Perth (PER) in September 2025 (see full year).

Return flights

15 Sep - 27 Oct	Ryanair
22 Sep - 07 Oct	Ryanair
01 Sep - 09 Sep	Ryanair
04 Sep - 17 Sep	Ryanair
04 Sep - 14 Sep	Ryanair
15 Sep - 21 Sep	Ryanair
15 Sep - 25 Sep	Ryanair
08 Sep - 13 Sep	Ryanair
04 Sep - 18 Sep	Ryanair
17 Sep - 30 Sep	easyJet
06 Sep - 25 Sep	Wizz Air
03 Sep - 09 Sep	easyJet
12 Sep - 04 Oct	easyJet
28 Sep - 11 Oct	easyJet
25 Sep - 18 Oct	easyJet
11 Sep - 04 Oct	easyJet

Also check the deals for one-way flights from London to Perth in September.

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 September from 784€

Return flights