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

Return flights

15 Dec - 19 Jan	Pegasus Airlines
10 Dec - 31 Dec	Pegasus Airlines
18 Dec - 01 Jan	Pegasus Airlines
22 Dec - 30 Dec	Pegasus Airlines
20 Dec - 04 Jan	Ryanair
22 Dec - 11 Jan	Pegasus Airlines
20 Dec - 03 Jan	Ryanair
19 Dec - 04 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 368€

Return flights