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

Return flights

29 Dec - 05 Jan	Thai AirAsia	direct
31 Dec - 10 Jan	Thai VietJet Air
27 Dec - 28 Dec	IndiGo
25 Dec - 31 Dec	IndiGo
30 Dec - 01 Jan	IndiGo
28 Dec - 01 Jan	IndiGo
29 Dec - 07 Jan	IndiGo
28 Dec - 22 Jan	IndiGo
25 Dec - 16 Jan	IndiGo	direct
30 Dec - 10 Jan	IndiGo
25 Dec - 31 Dec	IndiGo	direct
26 Dec - 29 Dec	IndiGo
27 Dec - 28 Dec	IndiGo	direct
28 Dec - 01 Jan	Thai AirAsia	direct
28 Dec - 30 Dec	IndiGo
31 Dec - 10 Jan	Thai AirAsia	direct
26 Dec - 28 Dec	IndiGo	direct
25 Dec - 28 Dec	Air India
25 Dec - 28 Dec	IndiGo	direct
29 Dec - 29 Dec	Air India

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 231€

Return flights