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

Return flights

03 Dec - 22 Dec	easyJet
03 Dec - 19 Dec	easyJet
09 Dec - 13 Jan	British Airways
30 Dec - 12 Jan	British Airways
24 Dec - 16 Jan	British Airways
16 Dec - 30 Dec	Aer Lingus
21 Dec - 28 Dec	British Airways
30 Dec - 11 Jan	British Airways
18 Dec - 30 Dec	British Airways
28 Dec - 08 Jan	British Airways
05 Dec - 07 Dec	KLM
15 Dec - 02 Jan	easyJet
17 Dec - 05 Jan	British Airways

Also check the deals for one-way flights from Belfast to Bangkok 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 Belfast to Bangkok in December from 609€

Return flights