Cheapest return flights from London to Madrid in September from 166€

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

Return flights

28 Sep - 01 Oct British Airways direct
23 Sep - 14 Oct British Airways direct
28 Sep - 02 Oct British Airways direct
28 Sep - 10 Oct British Airways direct
22 Sep - 25 Sep British Airways direct
07 Sep - 17 Sep British Airways direct
07 Sep - 12 Sep British Airways direct
21 Sep - 25 Sep British Airways direct
01 Sep - 17 Sep British Airways direct
16 Sep - 26 Sep British Airways direct
21 Sep - 22 Sep British Airways direct
14 Sep - 18 Sep British Airways direct
01 Sep - 08 Sep British Airways direct
09 Sep - 16 Sep Iberia direct
18 Sep - 05 Oct British Airways direct

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