Cheapest return OPO–BKK flights, September

AirHint found the following cheapest return flights from Porto (OPO) to Bangkok (BKK) in September 2026 (see full year).

Return flights

09 Sep - 22 Sep SWISS
24 Sep - 08 Oct SWISS
02 Sep - 23 Sep SWISS
15 Sep - 28 Sep SWISS
05 Sep - 19 Sep SWISS
01 Sep - 12 Sep SWISS
08 Sep - 22 Sep SWISS
09 Sep - 16 Sep Qatar Airways
19 Sep - 27 Sep British Airways
27 Sep - 09 Oct SWISS
27 Sep - 10 Oct SWISS
03 Sep - 09 Sep KLM
20 Sep - 30 Sep KLM

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

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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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