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

Return flights

03 Dec - 11 Dec	Ryanair
10 Dec - 25 Jan	Pegasus Airlines
03 Dec - 18 Dec	Pegasus Airlines
14 Dec - 12 Jan	Ryanair
01 Dec - 14 Dec	Ryanair
28 Dec - 18 Jan	Ryanair
11 Dec - 16 Jan	Ryanair
16 Dec - 18 Jan	Ryanair
29 Dec - 15 Jan	Ryanair
02 Dec - 08 Dec	Ryanair
26 Dec - 30 Jan	Pegasus Airlines
10 Dec - 18 Dec	Ryanair
01 Dec - 31 Dec	Ryanair
16 Dec - 20 Jan	Ryanair
07 Dec - 28 Dec	Pegasus Airlines
02 Dec - 15 Dec	Ryanair
09 Dec - 09 Jan	Ryanair
12 Dec - 12 Jan	Ryanair
10 Dec - 17 Dec	Pegasus Airlines
03 Dec - 07 Dec	Pegasus Airlines

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

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 December from 838€

Return flights