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

Return flights

05 Dec - 12 Dec	Turkish Airlines
06 Dec - 27 Dec	Turkish Airlines
01 Dec - 31 Dec	Turkish Airlines
01 Dec - 07 Jan	Turkish Airlines
21 Dec - 04 Jan	Aegean Airlines
13 Dec - 03 Jan	Aegean Airlines
20 Dec - 03 Jan	Aegean Airlines
19 Dec - 04 Jan	Aegean Airlines

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

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 December from 380€

Return flights