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

Return flights

11 May - 18 May	TAP	direct
07 May - 11 May	TAP	direct
14 May - 17 May	TAP	direct
08 May - 13 May	TAP	direct
04 May - 11 May	TAP	direct
08 May - 11 May	British Airways
26 May - 30 May	British Airways
28 May - 30 May	British Airways
15 May - 18 May	TAP	direct
08 May - 11 May	TAP	direct
25 May - 01 Jun	TAP	direct
29 May - 01 Jun	British Airways
29 May - 01 Jun	TAP	direct

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 $206

Return flights