Cheapest return flights from London to Barcelona in September from $166

Best time to book flights for London (LCY) to Barcelona (BCN) flights at AirHint

AirHint found the following cheapest return flights from London (LCY) to Barcelona (BCN) in September 2025 (see full year).

Return flights

14 Sep - 19 Sep British Airways direct
14 Sep - 18 Sep British Airways direct
16 Sep - 18 Sep British Airways direct
14 Sep - 26 Sep British Airways direct
08 Sep - 19 Sep British Airways direct
12 Sep - 18 Sep British Airways direct
12 Sep - 19 Sep British Airways direct
21 Sep - 25 Sep British Airways direct
02 Sep - 04 Sep British Airways direct
14 Sep - 30 Sep British Airways direct
22 Sep - 02 Oct KLM
26 Sep - 05 Oct British Airways direct
24 Sep - 01 Oct SWISS
23 Sep - 28 Oct SWISS
29 Sep - 04 Oct KLM
29 Sep - 03 Oct ITA Airways
27 Sep - 06 Oct ITA Airways
23 Sep - 03 Oct SWISS
29 Sep - 02 Oct Lufthansa
24 Sep - 05 Oct SWISS

Also check the deals for one-way flights from London to Barcelona 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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