Cheapest return flights from London to Porto in December from $256

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

06 Dec - 09 Dec KLM
02 Dec - 07 Dec SWISS
05 Dec - 08 Dec Luxair
05 Dec - 12 Dec Luxair
05 Dec - 07 Dec SWISS
26 Dec - 16 Jan KLM
01 Dec - 12 Jan Luxair
01 Dec - 05 Dec Luxair
15 Dec - 08 Jan Luxair
24 Dec - 30 Dec KLM
26 Dec - 29 Dec Luxair
25 Dec - 01 Jan KLM
29 Dec - 11 Jan Luxair
30 Dec - 03 Jan KLM
17 Dec - 07 Jan Luxair
20 Dec - 23 Dec KLM
24 Dec - 02 Jan KLM
23 Dec - 02 Jan KLM
16 Dec - 02 Jan KLM
22 Dec - 29 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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