Cheapest return flights from London to Lisbon in September from $339

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

Return flights

23 Sep - 27 Sep KLM
16 Sep - 23 Sep SWISS
01 Sep - 05 Sep SWISS
22 Sep - 29 Sep SWISS
09 Sep - 19 Sep KLM
29 Sep - 01 Oct SWISS
16 Sep - 29 Sep KLM
20 Sep - 27 Sep KLM
05 Sep - 08 Sep SWISS
24 Sep - 27 Sep Luxair
10 Sep - 15 Sep Lufthansa
30 Sep - 04 Oct Luxair

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

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