Cheapest return flights from London to Sydney in December from $1335

Best time to book flights for London (LCY) to Sydney (SYD) flights at AirHint

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

Return flights

02 Dec - 21 Jan Lufthansa
05 Dec - 25 Jan SWISS
30 Dec - 21 Jan Lufthansa
16 Dec - 06 Jan ITA Airways
11 Dec - 14 Jan British Airways
15 Dec - 25 Jan Lufthansa
17 Dec - 09 Jan Lufthansa
10 Dec - 11 Jan British Airways
16 Dec - 18 Jan Lufthansa
16 Dec - 09 Jan ITA Airways
03 Dec - 16 Dec KLM
10 Dec - 26 Dec British Airways
11 Dec - 31 Dec British Airways
04 Dec - 17 Dec KLM
01 Dec - 09 Dec KLM
01 Dec - 15 Dec KLM
08 Dec - 15 Dec KLM
08 Dec - 26 Dec KLM
01 Dec - 07 Dec KLM
05 Dec - 31 Dec ITA Airways

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

Skyscanner

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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