Cheapest return flights from London to Lisbon in September from $257

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

Return flights

16 Sep - 23 Sep SWISS
13 Sep - 23 Sep SWISS
01 Sep - 10 Sep SWISS
13 Sep - 15 Sep SWISS
03 Sep - 17 Sep SWISS
16 Sep - 19 Sep SWISS
04 Sep - 07 Sep SWISS
18 Sep - 21 Sep SWISS
17 Sep - 21 Sep SWISS
05 Sep - 08 Sep SWISS

Also check the deals for one-way flights from London to Lisbon in September.

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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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