AirHint found the following cheapest return flights from London (LCY) to Riga (RIX) in September 2025 (see full year).

Return flights

02 Sep - 11 Sep	Lufthansa
01 Sep - 09 Sep	Lufthansa
01 Sep - 05 Sep	Lufthansa
10 Sep - 24 Sep	Lufthansa
17 Sep - 24 Sep	Lufthansa
26 Sep - 06 Oct	Lufthansa
26 Sep - 29 Sep	Lufthansa
15 Sep - 22 Sep	Lufthansa
12 Sep - 16 Sep	Lufthansa
15 Sep - 19 Sep	Lufthansa
29 Sep - 06 Oct	Lufthansa
03 Sep - 10 Sep	Lufthansa
25 Sep - 02 Oct	KLM
29 Sep - 03 Oct	KLM
15 Sep - 17 Oct	KLM
27 Sep - 05 Oct	KLM
30 Sep - 03 Oct	KLM
29 Sep - 01 Oct	KLM
29 Sep - 04 Oct	KLM
30 Sep - 04 Oct	KLM

Also check the deals for one-way flights from London to Riga 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 Riga in September from 219€

Return flights