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

Return flights

31 Jan - 03 Feb	Iberia
26 Jan - 29 Jan	TAP
25 Jan - 29 Jan	TAP
22 Jan - 25 Jan	TAP
29 Jan - 05 Feb	TAP
18 Jan - 24 Jan	TAP
25 Jan - 30 Jan	TAP
24 Jan - 28 Jan	TAP
18 Jan - 31 Jan	TAP
17 Jan - 28 Jan	TAP
19 Jan - 28 Jan	TAP
20 Jan - 28 Jan	TAP
17 Jan - 04 Feb	TAP
29 Jan - 03 Feb	TAP
29 Jan - 02 Feb	TAP
31 Jan - 07 Feb	TAP
26 Jan - 02 Feb	TAP
25 Jan - 01 Feb	TAP
31 Jan - 08 Feb	TAP
29 Jan - 01 Feb	TAP

Also check the deals for one-way flights from London to Porto 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 London to Porto in January from 123€

Return flights