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

Return flights

17 Sep - 08 Oct	Ryanair	direct
20 Sep - 08 Oct	Ryanair	direct
17 Sep - 01 Oct	Ryanair	direct
27 Sep - 08 Oct	Ryanair	direct
20 Sep - 01 Oct	Ryanair	direct
27 Sep - 15 Oct	Ryanair	direct
20 Sep - 27 Sep	Ryanair	direct
17 Sep - 27 Sep	Ryanair	direct
24 Sep - 27 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
20 Sep - 22 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
24 Sep - 08 Oct	Ryanair	direct
20 Sep - 24 Sep	Ryanair
24 Sep - 15 Oct	Ryanair	direct
11 Sep - 14 Sep	Ryanair
08 Sep - 15 Sep	Ryanair
24 Sep - 01 Oct	Ryanair	direct
17 Sep - 04 Oct	Ryanair	direct

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

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 Porto to Liverpool in September from $108

Return flights