Cheapest return flights from London to Porto in September from $97

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

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

Return flights

29 Sep - 09 Oct Ryanair direct
29 Sep - 14 Oct Ryanair direct
29 Sep - 15 Oct Ryanair direct
23 Sep - 09 Oct Ryanair direct
23 Sep - 14 Oct Ryanair direct
21 Sep - 27 Sep easyJet direct
21 Sep - 25 Sep easyJet direct
15 Sep - 19 Sep easyJet direct
29 Sep - 08 Oct Ryanair direct
23 Sep - 27 Sep easyJet direct
24 Sep - 27 Sep easyJet direct
23 Sep - 08 Oct Ryanair direct
30 Sep - 09 Oct Ryanair direct
30 Sep - 14 Oct Ryanair direct
30 Sep - 15 Oct Ryanair direct
23 Sep - 24 Sep Ryanair direct
13 Sep - 18 Sep easyJet direct
16 Sep - 24 Sep Ryanair direct
06 Sep - 12 Sep easyJet direct
26 Sep - 28 Sep easyJet direct

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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