Cheapest one-way flights from Shannon to Porto in September from $41

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

One-Way flights

28 Sep Ryanair direct
11 Sep Ryanair direct
10 Sep Ryanair direct
18 Sep Ryanair direct
03 Sep Ryanair direct
01 Sep Ryanair
19 Sep Ryanair
25 Sep Ryanair
25 Sep Ryanair direct

Also check the deals for return flights from Shannon 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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