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

Return flights

17 Sep - 29 Oct	Ryanair
17 Sep - 27 Oct	Ryanair
03 Sep - 30 Sep	Etihad Airways
25 Sep - 06 Oct	Etihad Airways
22 Sep - 29 Sep	Etihad Airways
03 Sep - 25 Sep	Etihad Airways
22 Sep - 20 Oct	Etihad Airways
17 Sep - 30 Oct	Ryanair
02 Sep - 01 Oct	Etihad Airways
02 Sep - 25 Sep	Etihad Airways
23 Sep - 14 Oct	Etihad Airways
30 Sep - 07 Oct	Etihad Airways
10 Sep - 25 Sep	Etihad Airways
22 Sep - 30 Sep	Etihad Airways
08 Sep - 24 Sep	KLM
09 Sep - 30 Sep	Etihad Airways
10 Sep - 30 Sep	Etihad Airways
10 Sep - 24 Sep	KLM
22 Sep - 23 Oct	Etihad Airways
03 Sep - 02 Oct	KLM

Also check the deals for one-way flights from Dublin 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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Dublin to Bangkok in September from $598

Return flights