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

Return flights

02 Dec - 30 Dec	Jetstar
17 Dec - 27 Dec	Jetstar
07 Dec - 07 Jan	Jetstar
15 Dec - 11 Jan	Jetstar
26 Dec - 09 Jan	Jetstar
08 Dec - 05 Jan	Jetstar
29 Dec - 12 Jan	Virgin Australia
11 Dec - 01 Jan	Indonesia AirAsia
08 Dec - 07 Jan	Jetstar
03 Dec - 01 Jan	Jetstar
30 Dec - 13 Jan	Qantas
16 Dec - 10 Jan	Jetstar
02 Dec - 17 Dec	Jetstar
17 Dec - 30 Dec	Jetstar
08 Dec - 18 Dec	China Southern
14 Dec - 24 Dec	Qatar Airways
17 Dec - 23 Dec	Qatar Airways
22 Dec - 30 Dec	Jetstar
08 Dec - 22 Dec	Qatar Airways
13 Dec - 28 Dec	Qatar Airways

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 1289€

Return flights