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

Return flights

22 Dec - 15 Jan	Thai AirAsia	direct
16 Dec - 17 Dec	IndiGo
18 Dec - 15 Jan	Thai AirAsia	direct
18 Dec - 16 Jan	Thai AirAsia
18 Dec - 16 Jan	Thai AirAsia	direct
29 Dec - 07 Jan	IndiGo	direct
25 Dec - 01 Jan	IndiGo
17 Dec - 19 Jan	Thai VietJet Air
30 Dec - 06 Jan	Thai VietJet Air
25 Dec - 17 Jan	IndiGo
25 Dec - 17 Jan	Thai AirAsia	direct
13 Dec - 14 Dec	IndiGo
16 Dec - 18 Dec	IndiGo
19 Dec - 26 Dec	IndiGo	direct
18 Dec - 19 Dec	IndiGo
17 Dec - 19 Dec	IndiGo
13 Dec - 16 Dec	IndiGo
17 Dec - 18 Dec	IndiGo
13 Dec - 14 Dec	IndiGo	direct
15 Dec - 18 Dec	IndiGo

Also check the deals for one-way flights from Bangkok to Kolkata 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 Kolkata in December from $264

Return flights