AirHint found the following cheapest return flights from London (LHR) to Porto (OPO) in December 2026 (see full year).

Return flights

25 Dec - 31 Dec	Iberia
25 Dec - 28 Dec	Iberia
05 Dec - 09 Dec	Iberia
30 Dec - 04 Jan	Iberia
28 Dec - 04 Jan	Iberia
12 Dec - 13 Dec	Iberia
10 Dec - 13 Dec	Iberia
13 Dec - 25 Dec	Iberia
26 Dec - 01 Jan	Iberia
17 Dec - 05 Jan	Iberia
29 Dec - 01 Jan	Iberia
19 Dec - 31 Dec	Iberia
27 Dec - 02 Jan	Iberia
22 Dec - 29 Dec	Iberia
17 Dec - 18 Dec	Iberia
23 Dec - 02 Jan	Iberia
19 Dec - 28 Dec	Iberia
21 Dec - 01 Jan	Iberia

Also check the deals for one-way flights from London to Porto 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 London to Porto in December from 151€

Return flights