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

Return flights

02 Dec - 08 Dec	Pegasus Airlines
04 Dec - 11 Dec	Pegasus Airlines
03 Dec - 13 Dec	Pegasus Airlines
06 Dec - 30 Dec	Pegasus Airlines
15 Dec - 22 Dec	Pegasus Airlines
10 Dec - 04 Jan	Pegasus Airlines
01 Dec - 14 Dec	Lufthansa
18 Dec - 04 Jan	Pegasus Airlines
24 Dec - 10 Jan	Pegasus Airlines
20 Dec - 04 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 $407

Return flights