Cheapest return flights from Porto to Shannon in September from $108

Best time to book flights for Porto (OPO) to Shannon (SNN) flights at AirHint

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

Return flights

25 Sep - 15 Oct Ryanair direct
25 Sep - 05 Oct Ryanair direct
04 Sep - 24 Sep Ryanair direct
11 Sep - 24 Sep Ryanair direct
04 Sep - 17 Sep Ryanair direct
11 Sep - 17 Sep Ryanair direct
25 Sep - 09 Oct Ryanair direct
04 Sep - 18 Sep Ryanair direct
04 Sep - 21 Sep Ryanair direct
11 Sep - 18 Sep Ryanair direct
11 Sep - 21 Sep Ryanair direct
04 Sep - 10 Sep Ryanair direct
07 Sep - 24 Sep Ryanair direct
24 Sep - 05 Oct Ryanair direct
25 Sep - 01 Oct Ryanair direct
21 Sep - 05 Oct Ryanair direct
25 Sep - 02 Oct Ryanair direct
28 Sep - 15 Oct Ryanair direct
28 Sep - 05 Oct Ryanair direct
11 Sep - 01 Oct Ryanair direct

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