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

Return flights

30 May - 06 Jun	easyJet
16 May - 19 May	Air Europa
09 May - 23 May	easyJet
21 May - 28 May	Lufthansa	direct
23 May - 06 Jun	Air Europa
07 May - 21 May	Air Europa
30 May - 20 Jun	Air Europa
30 May - 13 Jun	Air Europa
16 May - 19 May	Lufthansa	direct
09 May - 23 May	Lufthansa	direct
14 May - 18 May	Air Europa
30 May - 14 Jun	Lufthansa	direct
14 May - 24 May	Air Europa
07 May - 10 May	Ryanair
01 May - 04 May	Ryanair

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 165€

Return flights