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

Return flights

17 Sep - 01 Oct	Ryanair
11 Sep - 19 Sep	Ryanair
18 Sep - 29 Sep	Ryanair
23 Sep - 13 Oct	Ryanair
20 Sep - 03 Oct	Air Europa
10 Sep - 16 Sep	Ryanair
16 Sep - 23 Sep	Ryanair
28 Sep - 14 Oct	Ryanair
10 Sep - 09 Oct	Ryanair
17 Sep - 24 Sep	Ryanair
04 Sep - 21 Sep	Air Europa
16 Sep - 30 Sep	Ryanair
13 Sep - 18 Sep	Ryanair
12 Sep - 17 Oct	Ryanair
25 Sep - 02 Oct	Ryanair
15 Sep - 22 Sep	Air Europa
25 Sep - 01 Oct	easyJet
15 Sep - 29 Sep	Air Europa
22 Sep - 17 Oct	Ryanair
26 Sep - 03 Oct	easyJet

Also check the deals for one-way flights from Porto 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 Porto to Bangkok in September from 575€

Return flights