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

Return flights

06 Dec - 20 Dec	British Airways
10 Dec - 17 Dec	British Airways
01 Dec - 22 Dec	Turkish Airlines
09 Dec - 01 Jan	Turkish Airlines
06 Dec - 31 Dec	Turkish Airlines
08 Dec - 11 Jan	Aegean Airlines
14 Dec - 12 Jan	LOT
08 Dec - 10 Jan	British Airways
11 Dec - 22 Dec	Austrian Airlines
07 Dec - 14 Dec	Austrian Airlines
01 Dec - 25 Jan	Lufthansa
06 Dec - 21 Dec	Lufthansa
06 Dec - 13 Dec	Lufthansa
01 Dec - 11 Dec	Lufthansa
01 Dec - 31 Dec	Lufthansa
03 Dec - 07 Jan	Lufthansa
08 Dec - 28 Jan	Lufthansa
15 Dec - 12 Jan	Lufthansa
25 Dec - 12 Jan	Lufthansa
11 Dec - 15 Jan	Austrian 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 $426

Return flights