AirHint found the following cheapest return flights from Bangkok (BKK) to Istanbul (IST) in December 2025 (see full year).

Return flights

20 Dec - 28 Dec	Thai AirAsia X
04 Dec - 04 Jan	Thai AirAsia X
04 Dec - 10 Dec	Nok Air
19 Dec - 04 Jan	Thai Lion Air
04 Dec - 02 Jan	Thai AirAsia X
01 Dec - 11 Dec	SalamAir
18 Dec - 23 Dec	Nok Air
20 Dec - 12 Jan	IndiGo
13 Dec - 03 Jan	AirAsia
18 Dec - 01 Jan	Thai AirAsia X
22 Dec - 10 Jan	IndiGo
29 Dec - 06 Jan	SalamAir
28 Dec - 05 Jan	Air Arabia
20 Dec - 08 Jan	IndiGo
09 Dec - 29 Dec	SalamAir
19 Dec - 31 Dec	Thai Lion Air
10 Dec - 21 Dec	Thai VietJet Air
21 Dec - 25 Dec	Thai Lion Air
24 Dec - 29 Dec	SalamAir
01 Dec - 31 Dec	IndiGo

Also check the deals for one-way flights from Bangkok to Istanbul in December.

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 Istanbul in December from 414€

Return flights