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

Return flights

05 May - 12 May	Vueling Airlines
11 May - 12 May	Vueling Airlines
06 May - 12 May	Vueling Airlines
09 May - 15 May	Iberia
30 May - 02 Jun	Vueling Airlines
19 May - 24 May	TAP
06 May - 13 May	TAP
13 May - 24 May	TAP
11 May - 15 May	TAP
17 May - 22 May	TAP
12 May - 20 May	TAP
31 May - 02 Jun	Vueling Airlines
27 May - 03 Jun	Iberia
29 May - 02 Jun	TAP
29 May - 03 Jun	TAP
30 May - 03 Jun	TAP
28 May - 02 Jun	TAP
29 May - 07 Jun	TAP
28 May - 07 Jun	TAP
29 May - 06 Jun	TAP

Also check the deals for one-way flights from London 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 London to Porto in May from 103€

Return flights