Cheapest return DUB–OPO flights, May

AirHint found the following cheapest return flights from Dublin (DUB) to Porto (OPO) in May 2026 (see full year).

Return flights

19 May - 26 May Ryanair
24 May - 26 May Ryanair
28 May - 10 Jun Ryanair
27 May - 08 Jun Ryanair
19 May - 22 May Ryanair
27 May - 30 May Ryanair
26 May - 30 May Ryanair
27 May - 03 Jun Ryanair
18 May - 30 Jun Ryanair
26 May - 28 May Ryanair
24 May - 27 May Ryanair
19 May - 21 May Ryanair
20 May - 22 May Ryanair
26 May - 02 Jun Ryanair
19 May - 24 May Ryanair
27 May - 02 Jun Ryanair
28 May - 03 Jun Ryanair
29 May - 03 Jun Ryanair
29 May - 07 Jun Ryanair
26 May - 01 Jun Ryanair

Also check the deals for one-way flights from Dublin to Porto in May.

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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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