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

Return flights

19 Sep - 19 Oct	easyJet
25 Sep - 18 Oct	easyJet
20 Sep - 18 Oct	easyJet
14 Sep - 19 Oct	easyJet
09 Sep - 16 Sep	Ryanair
25 Sep - 13 Oct	Ryanair
22 Sep - 31 Oct	easyJet
21 Sep - 05 Oct	easyJet
09 Sep - 01 Oct	Ryanair
16 Sep - 23 Sep	Ryanair
14 Sep - 16 Oct	easyJet
21 Sep - 24 Sep	Ryanair
11 Sep - 14 Sep	Wizz Air UK
10 Sep - 18 Sep	easyJet
10 Sep - 17 Sep	easyJet
15 Sep - 23 Sep	easyJet
08 Sep - 18 Sep	easyJet
12 Sep - 16 Sep	easyJet
08 Sep - 29 Sep	easyJet
26 Sep - 13 Oct	Ryanair

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.

Book a cheap hotel in Perth

Cheap car rent in Perth

Cheapest return flights from London to Perth in September from 793€

Return flights