Cheapest return flights from Porto to Shannon in September from $95

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

03 Sep - 17 Sep Ryanair direct
03 Sep - 14 Sep Ryanair direct
25 Sep - 15 Oct Ryanair direct
03 Sep - 10 Sep Ryanair direct
03 Sep - 18 Sep Ryanair direct
18 Sep - 28 Sep Ryanair direct
18 Sep - 24 Sep Ryanair direct
03 Sep - 21 Sep Ryanair direct
25 Sep - 16 Oct Ryanair direct
10 Sep - 28 Sep Ryanair direct
10 Sep - 17 Sep Ryanair direct
10 Sep - 14 Sep Ryanair direct
25 Sep - 09 Oct Ryanair direct
25 Sep - 08 Oct Ryanair direct
18 Sep - 09 Oct Ryanair direct
18 Sep - 08 Oct Ryanair direct
24 Sep - 09 Oct Ryanair direct
24 Sep - 08 Oct Ryanair direct
25 Sep - 02 Oct Ryanair direct
18 Sep - 02 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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