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

Return flights

02 Dec - 15 Dec	AJet
02 Dec - 16 Dec	AJet
05 Dec - 12 Dec	Pegasus Airlines
03 Dec - 07 Dec	Pegasus Airlines
01 Dec - 16 Dec	AJet
09 Dec - 22 Dec	Pegasus Airlines
01 Dec - 15 Dec	Ryanair
02 Dec - 28 Dec	Pegasus Airlines
31 Dec - 25 Jan	Pegasus Airlines
10 Dec - 21 Jan	Pegasus Airlines
04 Dec - 11 Dec	easyJet
11 Dec - 20 Dec	Pegasus Airlines
28 Dec - 18 Jan	AJet
31 Dec - 11 Jan	Pegasus Airlines
30 Dec - 14 Jan	Pegasus Airlines
31 Dec - 26 Jan	Pegasus Airlines
30 Dec - 26 Jan	Pegasus Airlines
17 Dec - 15 Jan	easyJet
28 Dec - 12 Jan	AJet
13 Dec - 13 Jan	Wizz Air

Also check the deals for one-way flights from Basel 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 Basel to Bangkok in December from 536€

Return flights