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

Return flights

04 Dec - 07 Dec	Pegasus Airlines	direct
01 Dec - 08 Dec	easyJet
31 Dec - 10 Jan	easyJet
11 Dec - 19 Dec	easyJet
01 Dec - 08 Dec	Pegasus Airlines	direct
11 Dec - 19 Dec	Pegasus Airlines	direct
29 Dec - 05 Jan	AJet	direct
24 Dec - 05 Jan	easyJet
22 Dec - 05 Jan	easyJet
23 Dec - 05 Jan	British Airways
31 Dec - 04 Jan	easyJet
19 Dec - 23 Dec	Wizz Air
24 Dec - 28 Dec	easyJet
19 Dec - 02 Jan	easyJet
28 Dec - 04 Jan	easyJet
25 Dec - 27 Dec	SunExpress
19 Dec - 02 Jan	AJet	direct
31 Dec - 10 Jan	Pegasus Airlines	direct
23 Dec - 27 Dec	easyJet
25 Dec - 27 Dec	AJet	direct

Also check the deals for one-way flights from Basel to Istanbul 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 Istanbul in December from $115

Return flights