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

Return flights

02 Dec - 09 Dec	British Airways	direct
05 Dec - 12 Dec	British Airways	direct
08 Dec - 15 Dec	British Airways	direct
03 Dec - 07 Dec	Delta
16 Dec - 08 Jan	Delta
01 Dec - 31 Dec	Virgin Atlantic
26 Dec - 10 Jan	Virgin Atlantic
29 Dec - 05 Jan	Virgin Atlantic
29 Dec - 10 Jan	United
13 Dec - 20 Dec	Virgin Atlantic
14 Dec - 01 Jan	British Airways	direct
12 Dec - 20 Dec	KLM
15 Dec - 31 Dec	Virgin Atlantic
16 Dec - 06 Jan	Delta
15 Dec - 05 Jan	Delta
17 Dec - 07 Jan	KLM
24 Dec - 31 Dec	Virgin Atlantic
24 Dec - 01 Jan	Delta
17 Dec - 06 Jan	KLM
12 Dec - 20 Dec	British Airways	direct

Also check the deals for one-way flights from Austin 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 Austin to London in December from 480€

Return flights