Cheapest return flights from London to Sydney in December from $1078

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

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

Return flights

01 Dec - 30 Dec China Airlines
03 Dec - 09 Dec China Airlines
03 Dec - 14 Dec China Airlines
26 Dec - 30 Dec China Airlines
01 Dec - 14 Dec China Airlines
02 Dec - 12 Dec Etihad Airways
03 Dec - 16 Dec China Airlines
27 Dec - 20 Jan China Airlines
29 Dec - 25 Jan China Airlines
31 Dec - 16 Jan China Airlines
26 Dec - 23 Jan China Airlines
27 Dec - 16 Jan China Airlines
29 Dec - 18 Jan China Airlines
24 Dec - 16 Jan China Airlines
24 Dec - 18 Jan China Airlines
26 Dec - 16 Jan China Airlines
01 Dec - 15 Jan Air China
01 Dec - 28 Dec China Airlines
07 Dec - 24 Dec Cathay Pacific
01 Dec - 22 Dec Cathay Pacific

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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