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

Return flights

04 Jul - 08 Jul	Iberia
04 Jul - 21 Jul	Iberia
07 Jul - 22 Jul	Iberia
09 Jul - 15 Jul	Iberia
04 Jul - 07 Jul	Iberia
01 Jul - 04 Jul	Iberia
10 Jul - 14 Jul	Iberia
08 Jul - 18 Jul	Iberia
07 Jul - 14 Jul	Iberia
11 Jul - 15 Jul	Iberia
14 Jul - 17 Aug	TAP
27 Jul - 10 Aug	TAP
30 Jul - 17 Aug	TAP
14 Jul - 05 Aug	TAP
15 Jul - 05 Aug	TAP
16 Jul - 05 Aug	TAP
27 Jul - 03 Aug	TAP
20 Jul - 05 Aug	TAP
20 Jul - 08 Aug	TAP
20 Jul - 01 Aug	TAP

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

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 July from 171€

Return flights