AirHint found the following cheapest return flights from Salt Lake City (SLC) to London (LHR) in December 2025 (see full year).

Return flights

11 Dec - 08 Jan	Scandinavian Airlines
15 Dec - 08 Jan	Scandinavian Airlines
11 Dec - 15 Dec	Frontier Airlines
15 Dec - 10 Jan	Scandinavian Airlines
01 Dec - 06 Dec	Frontier Airlines
10 Dec - 07 Jan	jetBlue
12 Dec - 16 Jan	Delta
17 Dec - 10 Jan	Frontier Airlines
11 Dec - 20 Dec	KLM
10 Dec - 07 Jan	Air France	direct
19 Dec - 29 Dec	Scandinavian Airlines
13 Dec - 17 Jan	Delta
15 Dec - 10 Jan	Air France	direct
20 Dec - 30 Dec	jetBlue
15 Dec - 08 Jan	Air France	direct
19 Dec - 31 Dec	Delta
19 Dec - 31 Dec	Virgin Atlantic	direct

Also check the deals for one-way flights from Salt Lake City 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 Salt Lake City to London in December from $646

Return flights