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

Return flights

08 Dec - 16 Jan	Pegasus Airlines
08 Dec - 20 Dec	Pegasus Airlines
05 Dec - 31 Dec	Pegasus Airlines
15 Dec - 15 Jan	Pegasus Airlines
31 Dec - 07 Jan	Pegasus Airlines
15 Dec - 28 Dec	Pegasus Airlines
16 Dec - 10 Jan	SunExpress
14 Dec - 10 Jan	Ryanair
05 Dec - 03 Jan	Pegasus Airlines
16 Dec - 30 Dec	Pegasus Airlines
20 Dec - 25 Jan	SunExpress
12 Dec - 02 Jan	Pegasus Airlines
24 Dec - 02 Jan	Pegasus Airlines
25 Dec - 03 Jan	Pegasus 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 287€

Return flights