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

Return flights

25 Sep - 02 Oct	Thai Lion Air
30 Sep - 07 Oct	Thai Lion Air
29 Sep - 02 Oct	Thai Lion Air
18 Sep - 25 Sep	Thai Lion Air
22 Sep - 28 Sep	Thai AirAsia
17 Sep - 24 Sep	Thai AirAsia
14 Sep - 21 Sep	Thai Lion Air
11 Sep - 19 Oct	Thai Lion Air
08 Sep - 11 Sep	Thai Lion Air
22 Sep - 02 Oct	Thai AirAsia
26 Sep - 03 Oct	Thai AirAsia
19 Sep - 26 Sep	Thai AirAsia
11 Sep - 15 Sep	Thai Lion Air
08 Sep - 15 Sep	Thai Lion Air
28 Sep - 05 Oct	Thai AirAsia X
06 Sep - 13 Sep	Thai Lion Air
20 Sep - 27 Sep	AirAsia

Also check the deals for one-way flights from Bangkok to Rome 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 Bangkok to Rome in September from $605

Return flights