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

Return flights

29 Sep - 27 Oct	airBaltic
24 Sep - 05 Oct	Ryanair
25 Sep - 24 Oct	Norwegian Air Sweden AOC
19 Sep - 26 Sep	Finnair
21 Sep - 22 Oct	Ryanair
25 Sep - 07 Oct	Finnair
20 Sep - 04 Oct	Ryanair
20 Sep - 02 Oct	airBaltic
12 Sep - 19 Sep	Ryanair
29 Sep - 14 Oct	airBaltic
19 Sep - 02 Oct	Finnair
26 Sep - 12 Oct	Finnair
18 Sep - 28 Sep	airBaltic
09 Sep - 19 Sep	Ryanair
20 Sep - 30 Sep	LOT
12 Sep - 27 Sep	Ryanair
21 Sep - 25 Sep	Ryanair
09 Sep - 24 Sep	Ryanair
09 Sep - 21 Sep	Ryanair
09 Sep - 23 Sep	airBaltic

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 582€

Return flights