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

Return flights

05 Dec - 07 Dec	Pegasus Airlines
31 Dec - 27 Jan	Pegasus Airlines
04 Dec - 24 Dec	Pegasus Airlines
03 Dec - 17 Dec	AJet
10 Dec - 21 Jan	Pegasus Airlines
31 Dec - 13 Jan	AJet
08 Dec - 22 Dec	Wizz Air
04 Dec - 18 Dec	Pegasus Airlines
04 Dec - 17 Dec	easyJet
29 Dec - 18 Jan	Pegasus Airlines
09 Dec - 22 Dec	easyJet
30 Dec - 15 Jan	Pegasus Airlines
31 Dec - 11 Jan	AJet
28 Dec - 17 Jan	Pegasus Airlines
11 Dec - 20 Dec	easyJet
30 Dec - 11 Jan	Pegasus Airlines
29 Dec - 13 Jan	Pegasus Airlines
27 Dec - 11 Jan	Pegasus Airlines
07 Dec - 14 Dec	AJet
11 Dec - 30 Dec	easyJet

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 $647

Return flights