Cheapest return flights from Shannon to Porto in September from $220

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

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

Return flights

03 Sep - 07 Sep Ryanair direct

Also check the deals for one-way 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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