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

Return flights

01 Dec - 08 Dec	Jetstar
02 Dec - 06 Jan	Emirates
17 Dec - 31 Dec	Singapore Airlines
23 Dec - 20 Jan	Cathay Pacific
15 Dec - 29 Dec	Singapore Airlines
23 Dec - 10 Jan	Emirates
10 Dec - 03 Jan	Emirates
15 Dec - 28 Dec	Emirates
20 Dec - 10 Jan	Emirates
18 Dec - 03 Jan	Emirates
10 Dec - 19 Dec	Emirates

Also check the deals for one-way flights from Cairns 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.

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Cheapest return flights from Cairns to London in December from $1187

Return flights