AirHint found the following cheapest return flights from London (LCY) to Zagreb (ZAG) in September 2026 (see full year).

Return flights

02 Sep - 05 Sep	KLM
28 Sep - 06 Oct	Lufthansa
23 Sep - 26 Sep	KLM
29 Sep - 04 Oct	KLM
26 Sep - 04 Oct	KLM
28 Sep - 04 Oct	KLM
02 Sep - 07 Sep	KLM
25 Sep - 04 Oct	KLM
01 Sep - 04 Sep	KLM
01 Sep - 06 Sep	KLM
19 Sep - 20 Sep	KLM
18 Sep - 20 Sep	KLM
28 Sep - 05 Oct	KLM
24 Sep - 27 Sep	KLM
27 Sep - 04 Oct	KLM

Also check the deals for one-way flights from London to Zagreb 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 Zagreb in September from $266

Return flights