AirHint found the following cheapest return flights from San Diego (SAN) to London (LGW) in January 2026 (see full year).

Return flights

17 Jan - 22 Jan	Hawaiian Airlines
18 Jan - 25 Jan	Frontier Airlines
21 Jan - 25 Jan	Frontier Airlines
12 Jan - 27 Jan	Frontier Airlines
07 Jan - 14 Jan	Alaska Airlines
17 Jan - 21 Jan	Hawaiian Airlines
14 Jan - 19 Jan	Alaska Airlines
16 Jan - 22 Jan	Icelandair
16 Jan - 18 Jan	WestJet
02 Jan - 09 Jan	WestJet
26 Jan - 09 Feb	Iberia

Also check the deals for one-way flights from San Diego to London in January.

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 San Diego to London in January from $625

Return flights