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

Return flights

14 Dec - 04 Jan	Singapore Airlines
10 Dec - 08 Jan	Singapore Airlines
10 Dec - 28 Dec	Emirates
12 Dec - 08 Jan	Singapore Airlines
15 Dec - 28 Dec	Singapore Airlines
11 Dec - 15 Jan	Cathay Pacific
13 Dec - 05 Jan	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 $1862

Return flights