Cheapest return flights from London to Lisbon in September from $278

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

Return flights

02 Sep - 07 Sep Iberia
01 Sep - 08 Sep SWISS
03 Sep - 10 Sep KLM
28 Sep - 30 Sep SWISS
30 Sep - 07 Oct ITA Airways
01 Sep - 04 Sep SWISS
17 Sep - 22 Sep ITA Airways
15 Sep - 16 Sep SWISS
18 Sep - 21 Sep Luxair
13 Sep - 17 Sep SWISS
15 Sep - 22 Sep ITA Airways
30 Sep - 05 Oct ITA Airways
22 Sep - 03 Oct KLM
29 Sep - 03 Oct KLM
28 Sep - 05 Oct KLM
30 Sep - 04 Oct ITA Airways

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

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