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

Return flights

12 Sep - 30 Sep	AJet
10 Sep - 20 Sep	AJet
10 Sep - 25 Sep	AJet
07 Sep - 12 Sep	AJet
24 Sep - 30 Sep	AJet
21 Sep - 24 Sep	AJet
03 Sep - 10 Sep	AJet
01 Sep - 15 Sep	AJet
08 Sep - 15 Sep	AJet
19 Sep - 22 Sep	AJet
30 Sep - 03 Oct	AJet
22 Sep - 22 Oct	AJet
13 Sep - 19 Oct	AJet
05 Sep - 15 Oct	AJet
01 Sep - 04 Oct	AJet
13 Sep - 03 Oct	AJet
25 Sep - 02 Oct	AJet
18 Sep - 14 Oct	AJet
30 Sep - 31 Oct	Wizz Air UK
21 Sep - 04 Oct	Austrian Airlines

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

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 September from $426

Return flights