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

Return flights

27 May - 08 Jun	Air Europa
03 May - 07 May	Ryanair
07 May - 14 May	Air Europa
23 May - 06 Jun	Air Europa
07 May - 14 May	Lufthansa	direct
08 May - 11 May	TAP
28 May - 04 Jun	Lufthansa	direct
08 May - 11 May	Lufthansa	direct
07 May - 17 May	Air Europa
07 May - 17 May	Lufthansa	direct
03 May - 07 May	Lufthansa	direct
11 May - 13 May	Lufthansa	direct
27 May - 08 Jun	Lufthansa	direct
23 May - 06 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 $182

Return flights