AirHint found the following cheapest return flights from Adelaide (ADL) to London (STN) in December 2025 (see full year).

Return flights

06 Dec - 13 Dec	Indonesia AirAsia
13 Dec - 13 Jan	Jetstar
07 Dec - 12 Dec	Jetstar
18 Dec - 30 Dec	Indonesia AirAsia
18 Dec - 13 Jan	Indonesia AirAsia
18 Dec - 28 Dec	Indonesia AirAsia
18 Dec - 23 Dec	Indonesia AirAsia
18 Dec - 15 Jan	Indonesia AirAsia
27 Dec - 15 Jan	Virgin Australia
27 Dec - 03 Jan	Virgin Australia
09 Dec - 23 Dec	Emirates
07 Dec - 29 Dec	Emirates
03 Dec - 07 Dec	Emirates
06 Dec - 23 Dec	Emirates
05 Dec - 27 Dec	Emirates
20 Dec - 13 Jan	Jetstar
17 Dec - 07 Jan	Qatar Airways
22 Dec - 30 Jan	Emirates
15 Dec - 24 Jan	Emirates
15 Dec - 23 Jan	Emirates

Also check the deals for one-way flights from Adelaide 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 Adelaide to London in December from $1471

Return flights