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

Return flights

06 May - 20 May	TAP	direct
12 May - 28 May	TAP	direct
13 May - 21 May	TAP	direct
30 May - 12 Jun	TAP	direct
26 May - 02 Jun	TAP	direct
09 May - 18 May	TAP	direct
16 May - 24 May	TAP	direct
07 May - 18 May	TAP	direct
25 May - 28 May	TAP	direct
25 May - 27 May	TAP	direct
04 May - 11 May	TAP	direct
26 May - 28 May	TAP	direct
28 May - 02 Jun	TAP	direct
31 May - 07 Jun	TAP	direct
30 May - 07 Jun	TAP	direct
30 May - 06 Jun	TAP	direct
28 May - 04 Jun	TAP	direct
27 May - 07 Jun	TAP	direct
28 May - 05 Jun	TAP	direct
29 May - 06 Jun	Iberia

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 163€

Return flights