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

Return flights

06 Dec - 10 Dec	Frontier Airlines
25 Dec - 06 Jan	Frontier Airlines
26 Dec - 07 Jan	Frontier Airlines
10 Dec - 17 Dec	Frontier Airlines
23 Dec - 30 Dec	Frontier Airlines
22 Dec - 31 Dec	Frontier Airlines
16 Dec - 27 Dec	Frontier Airlines
12 Dec - 29 Dec	Frontier Airlines
22 Dec - 27 Dec	Frontier Airlines
21 Dec - 30 Dec	United
19 Dec - 24 Dec	Frontier Airlines
18 Dec - 25 Dec	Frontier Airlines
26 Dec - 02 Jan	Frontier Airlines
26 Dec - 07 Jan	Delta	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 856€

Return flights