Cheapest return flights from Porto to London in September from 55€

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

Return flights

25 Sep - 28 Sep Ryanair direct
17 Sep - 28 Sep Ryanair direct
18 Sep - 28 Sep Ryanair direct
26 Sep - 28 Sep Ryanair direct
25 Sep - 07 Oct Ryanair direct
17 Sep - 07 Oct Ryanair direct
17 Sep - 21 Sep Ryanair direct
18 Sep - 07 Oct Ryanair direct
24 Sep - 28 Sep Ryanair direct
18 Sep - 21 Sep Ryanair direct
12 Sep - 28 Sep Ryanair direct
26 Sep - 07 Oct Ryanair direct
23 Sep - 28 Sep Ryanair direct
25 Sep - 14 Oct Ryanair direct
25 Sep - 27 Sep Ryanair direct
25 Sep - 15 Oct Ryanair direct
25 Sep - 08 Oct Ryanair direct
18 Sep - 08 Oct Ryanair direct
26 Sep - 14 Oct Ryanair direct
26 Sep - 15 Oct Ryanair direct

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