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

Return flights

08 Sep - 10 Sep	Wizz Air
08 Sep - 12 Sep	Wizz Air
24 Sep - 28 Sep	Ryanair
22 Sep - 07 Oct	Ryanair
08 Sep - 14 Sep	Wizz Air
26 Sep - 30 Sep	Ryanair
27 Sep - 30 Sep	Ryanair
27 Sep - 29 Sep	Ryanair
08 Sep - 13 Sep	Wizz Air
01 Sep - 07 Sep	Wizz Air
26 Sep - 28 Sep	Ryanair
28 Sep - 05 Oct	Ryanair
30 Sep - 02 Oct	Ryanair
10 Sep - 01 Oct	Ryanair
30 Sep - 03 Oct	Ryanair

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 128€

Return flights