AirHint found the following cheapest return flights from Sydney (SYD) to London (LGW) in December 2025 (see full year).

Return flights

04 Dec - 07 Dec	Scoot
04 Dec - 11 Dec	Scoot
01 Dec - 08 Dec	China Eastern
04 Dec - 10 Dec	Scoot
01 Dec - 16 Dec	Scoot
04 Dec - 23 Dec	China Eastern
02 Dec - 09 Dec	Turkish Airlines
05 Dec - 16 Dec	Jetstar
09 Dec - 16 Dec	Hainan Airlines
10 Dec - 16 Dec	Jetstar
07 Dec - 15 Jan	Scoot
04 Dec - 15 Jan	Scoot
06 Dec - 15 Jan	Jetstar
05 Dec - 18 Jan	Jetstar
25 Dec - 25 Jan	Scoot
01 Dec - 01 Jan	Scoot
14 Dec - 11 Jan	Scoot
03 Dec - 03 Jan	Scoot
03 Dec - 07 Jan	Scoot
14 Dec - 17 Jan	Hainan Airlines

Also check the deals for one-way flights from Sydney to London 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Sydney to London in December from $875

Return flights