Cheapest return flights from London to Porto in September from 182€

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

Return flights

05 Sep - 12 Sep Iberia
01 Sep - 15 Sep Iberia
11 Sep - 14 Sep Iberia
11 Sep - 15 Sep Iberia
16 Sep - 20 Sep TAP
17 Sep - 20 Sep TAP
24 Sep - 29 Sep TAP
25 Sep - 28 Sep TAP
27 Sep - 30 Sep TAP
19 Sep - 21 Sep TAP

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

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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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