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

Return flights

12 Sep - 19 Sep	Norwegian Air Sweden AOC
02 Sep - 09 Sep	Ryanair
09 Sep - 23 Sep	Ryanair
23 Sep - 29 Sep	Finnair
24 Sep - 08 Oct	Finnair
25 Sep - 25 Oct	Finnair
26 Sep - 26 Oct	Finnair
18 Sep - 01 Oct	Finnair
17 Sep - 02 Oct	Finnair
02 Sep - 17 Sep	Ryanair
02 Sep - 16 Sep	Ryanair
10 Sep - 24 Sep	Finnair
24 Sep - 07 Oct	Finnair
22 Sep - 06 Oct	Finnair
16 Sep - 14 Oct	Finnair
10 Sep - 20 Sep	Finnair
08 Sep - 12 Sep	Norwegian Air Sweden AOC
15 Sep - 14 Oct	Finnair
10 Sep - 08 Oct	Finnair
18 Sep - 22 Sep	Finnair

Also check the deals for one-way flights from Riga to Bangkok 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 Riga to Bangkok in September from 540€

Return flights