Cheapest return flights from London to Barcelona in September from $146

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

11 Sep - 18 Sep British Airways direct
01 Sep - 04 Sep British Airways direct
05 Sep - 12 Sep British Airways direct
19 Sep - 26 Sep British Airways direct
11 Sep - 14 Sep British Airways direct
17 Sep - 21 Sep British Airways direct
01 Sep - 05 Sep British Airways direct
03 Sep - 10 Sep British Airways direct
12 Sep - 21 Sep British Airways direct
03 Sep - 16 Sep British Airways direct
26 Sep - 02 Oct British Airways direct
25 Sep - 01 Oct KLM
18 Sep - 11 Oct KLM
25 Sep - 01 Oct British Airways direct

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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