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

Return flights

04 Sep - 22 Oct	Air China
17 Sep - 22 Oct	Air China
23 Sep - 28 Oct	Air China
02 Sep - 09 Sep	Ryanair
07 Sep - 21 Sep	Oman Air
01 Sep - 20 Sep	Oman Air
07 Sep - 13 Sep	Oman Air
10 Sep - 21 Sep	Oman Air
03 Sep - 12 Sep	Oman Air
05 Sep - 19 Sep	Oman Air
03 Sep - 14 Sep	Oman Air
05 Sep - 21 Sep	Oman Air
15 Sep - 19 Sep	Oman Air
26 Sep - 01 Oct	Oman Air
21 Sep - 24 Oct	Oman Air
14 Sep - 01 Oct	Oman Air
24 Sep - 08 Oct	SWISS
18 Sep - 15 Oct	SWISS
22 Sep - 05 Oct	SWISS
30 Sep - 15 Oct	SWISS

Also check the deals for one-way flights from Rome 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 Rome to Bangkok in September from $522

Return flights