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

Return flights

06 May - 20 May	Ryanair
30 May - 10 Jun	Lufthansa	direct
14 May - 23 May	Air Europa
22 May - 31 May	Air Europa
08 May - 22 May	Air Europa
14 May - 30 May	Air Europa
16 May - 23 May	Air Europa
14 May - 03 Jun	Air Europa
29 May - 07 Jun	Air Europa
04 May - 08 May	Air Europa
06 May - 20 May	Lufthansa	direct
05 May - 07 May	Ryanair
06 May - 08 May	Ryanair
29 May - 07 Jun	Lufthansa	direct

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

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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Cheapest return flights from Frankfurt to Porto in May from $216

Return flights