AirHint found the following cheapest one-way flights from London (LHR) to Lisbon (LIS) in December 2025 (see full year).

One-Way flights

31 Dec	Vueling Airlines
02 Dec	Vueling Airlines
06 Dec	Vueling Airlines
04 Dec	Vueling Airlines
03 Dec	Vueling Airlines
14 Dec	Vueling Airlines
11 Dec	Vueling Airlines
10 Dec	Vueling Airlines
15 Dec	Vueling Airlines
13 Dec	Vueling Airlines

Also check the deals for return flights from London to Lisbon 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 one-way flights from London to Lisbon in December from $90

One-Way flights