AirHint found the following cheapest return flights from Sofia (SOF) to Bangkok (BKK) in August 2025 (see full year).

Return flights

25 Aug - 23 Sep	Austrian Airlines
26 Aug - 29 Sep	Austrian Airlines
31 Aug - 09 Sep	Austrian Airlines
31 Aug - 30 Sep	Austrian Airlines
31 Aug - 07 Sep	Austrian Airlines
31 Aug - 24 Sep	Austrian Airlines
22 Aug - 04 Sep	Austrian Airlines
18 Aug - 25 Aug	IndiGo
19 Aug - 23 Aug	IndiGo
05 Aug - 10 Aug	Turkish Airlines
08 Aug - 10 Aug	Turkish Airlines
05 Aug - 19 Aug	IndiGo
10 Aug - 24 Aug	IndiGo
03 Aug - 24 Aug	IndiGo
02 Aug - 23 Sep	Austrian Airlines

Also check the deals for one-way flights from Sofia to Bangkok in August.

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 Sofia to Bangkok in August from $647

Return flights