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

Return flights

29 Jul - 19 Aug	SWISS
17 Jul - 20 Jul	KLM
25 Jul - 28 Jul	KLM
24 Jul - 13 Aug	SWISS
24 Jul - 14 Aug	SWISS
17 Jul - 31 Jul	British Airways
16 Jul - 24 Jul	KLM
22 Jul - 29 Aug	SWISS
19 Jul - 08 Aug	KLM
17 Jul - 16 Aug	British Airways
22 Jul - 08 Aug	KLM
16 Jul - 20 Aug	British Airways
24 Jul - 29 Aug	SWISS
23 Jul - 01 Aug	KLM
16 Jul - 30 Jul	KLM
19 Jul - 30 Jul	KLM

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

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 July from $1733

Return flights