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

Return flights

02 Dec - 16 Dec	Air Canada
09 Dec - 16 Dec	British Airways	direct
02 Dec - 16 Dec	British Airways	direct
04 Dec - 11 Dec	British Airways	direct
01 Dec - 05 Dec	WestJet
14 Dec - 21 Dec	British Airways
16 Dec - 21 Dec	Delta
16 Dec - 21 Dec	Finnair	direct
18 Dec - 25 Dec	Finnair	direct
24 Dec - 31 Dec	British Airways	direct
16 Dec - 03 Jan	Aer Lingus
16 Dec - 03 Jan	British Airways	direct
17 Dec - 02 Jan	jetBlue
17 Dec - 02 Jan	Delta	direct
20 Dec - 03 Jan	Aer Lingus
18 Dec - 03 Jan	Aer Lingus
18 Dec - 04 Jan	United
18 Dec - 04 Jan	British Airways	direct
20 Dec - 03 Jan	British Airways	direct
18 Dec - 03 Jan	British Airways	direct

Also check the deals for one-way flights from Las Vegas 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 Las Vegas to London in December from $557

Return flights