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

Return flights

01 Dec - 08 Dec	Indonesia AirAsia
15 Dec - 31 Jan	Indonesia AirAsia
03 Dec - 10 Dec	Jetstar
30 Dec - 16 Jan	Jetstar
11 Dec - 22 Jan	Jetstar
08 Dec - 22 Jan	Virgin Australia
05 Dec - 09 Dec	Jetstar
15 Dec - 25 Dec	Indonesia AirAsia
08 Dec - 05 Jan	Virgin Australia
07 Dec - 07 Jan	Jetstar
23 Dec - 12 Jan	Jetstar
22 Dec - 12 Jan	Jetstar
16 Dec - 13 Jan	Jetstar
28 Dec - 09 Jan	Jetstar
18 Dec - 30 Dec	Jetstar
18 Dec - 28 Dec	Jetstar
16 Dec - 31 Dec	Jetstar
23 Dec - 28 Dec	Jetstar
21 Dec - 31 Dec	Jetstar
17 Dec - 30 Dec	Jetstar

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 $1312

Return flights