Cheapest return flights from London to Porto in December from $321

Best time to book flights for London (LCY) to Porto (OPO) flights at AirHint

AirHint found the following cheapest return flights from London (LCY) to Porto (OPO) in December 2025 (see full year).

Return flights

01 Dec - 05 Dec Luxair
12 Dec - 31 Dec Luxair
27 Dec - 10 Jan KLM
08 Dec - 03 Jan KLM
23 Dec - 01 Jan KLM
27 Dec - 03 Jan KLM
20 Dec - 10 Jan KLM
21 Dec - 05 Jan KLM
18 Dec - 03 Jan KLM
18 Dec - 18 Dec Lufthansa
24 Dec - 04 Jan KLM
19 Dec - 16 Jan Luxair
20 Dec - 26 Dec Luxair

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

Skyscanner

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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