AirHint found the following cheapest return flights from London (LCY) to Tehran (IKA) in August 2025 (see full year).

Return flights

28 Aug - 30 Sep	British Airways
20 Aug - 23 Sep	British Airways
21 Aug - 23 Sep	British Airways
20 Aug - 22 Sep	British Airways
21 Aug - 21 Sep	British Airways
25 Aug - 11 Sep	KLM
22 Aug - 26 Sep	Lufthansa
28 Aug - 04 Sep	SWISS
12 Aug - 19 Aug	SWISS
13 Aug - 27 Aug	SWISS
06 Aug - 12 Aug	British Airways
06 Aug - 02 Sep	British Airways
06 Aug - 20 Aug	SWISS
29 Aug - 05 Sep	British Airways
12 Aug - 28 Aug	SWISS
08 Aug - 28 Aug	SWISS
11 Aug - 27 Aug	SWISS
13 Aug - 17 Aug	British Airways
05 Aug - 28 Aug	British Airways
18 Aug - 24 Aug	SWISS

Also check the deals for one-way flights from London to Tehran in August.

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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Cheapest return flights from London to Tehran in August from $1311

Return flights