AirHint found the following cheapest return flights from London (LCY) to Lisbon (LIS) in May 2026 (see full year).

Return flights

05 May - 20 May	SWISS
27 May - 02 Jun	SWISS
12 May - 19 May	SWISS
20 May - 27 May	SWISS
27 May - 03 Jun	SWISS
16 May - 20 May	SWISS
13 May - 20 May	SWISS
06 May - 10 May	Lufthansa
29 May - 08 Jun	SWISS
11 May - 21 May	Lufthansa
14 May - 20 May	Lufthansa
01 May - 05 May	Lufthansa
27 May - 01 Jun	Lufthansa
20 May - 26 May	SWISS
29 May - 05 Jun	SWISS
27 May - 12 Jun	SWISS
29 May - 01 Jun	SWISS
27 May - 07 Jun	Lufthansa
25 May - 01 Jun	KLM
28 May - 01 Jun	SWISS

Also check the deals for one-way flights from London to Lisbon 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 Lisbon in May from 216€

Return flights