Cheapest return flights from London to Porto in September from $170

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

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

Return flights

29 Sep - 30 Sep Vueling Airlines
27 Sep - 30 Sep Vueling Airlines
17 Sep - 24 Sep Vueling Airlines
17 Sep - 30 Sep Vueling Airlines
16 Sep - 24 Sep Vueling Airlines
16 Sep - 30 Sep Vueling Airlines
24 Sep - 30 Sep Vueling Airlines
29 Sep - 14 Oct Vueling Airlines
29 Sep - 07 Oct Vueling Airlines
29 Sep - 08 Oct Vueling Airlines
27 Sep - 14 Oct Vueling Airlines
27 Sep - 07 Oct Vueling Airlines
27 Sep - 08 Oct Vueling Airlines
17 Sep - 07 Oct Vueling Airlines
24 Sep - 14 Oct Vueling Airlines
24 Sep - 07 Oct Vueling Airlines
24 Sep - 08 Oct Vueling Airlines
27 Sep - 29 Sep Vueling Airlines
17 Sep - 29 Sep Vueling Airlines
16 Sep - 29 Sep Vueling Airlines

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

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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