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

Return flights

30 Dec - 21 Jan	easyJet	direct
30 Dec - 22 Jan	easyJet	direct
30 Dec - 23 Jan	easyJet	direct
30 Dec - 24 Jan	easyJet	direct
30 Dec - 20 Jan	easyJet	direct
31 Dec - 20 Jan	easyJet	direct
29 Dec - 21 Jan	easyJet	direct
29 Dec - 22 Jan	easyJet	direct
30 Dec - 16 Jan	easyJet	direct
30 Dec - 17 Jan	easyJet	direct
30 Dec - 31 Dec	easyJet	direct
23 Dec - 24 Dec	easyJet
29 Dec - 31 Dec	easyJet	direct
22 Dec - 24 Dec	easyJet
23 Dec - 25 Dec	easyJet
24 Dec - 29 Dec	KLM
25 Dec - 31 Dec	KLM
25 Dec - 28 Dec	Lufthansa
29 Dec - 30 Dec	easyJet	direct
24 Dec - 25 Dec	easyJet	direct

Also check the deals for one-way flights from Basel to Porto 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 Porto in December from 142€

Return flights