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

Return flights

05 Dec - 08 Dec	easyJet	direct
05 Dec - 18 Dec	easyJet	direct
05 Dec - 07 Dec	easyJet	direct
15 Dec - 19 Dec	easyJet
04 Dec - 07 Dec	easyJet
04 Dec - 07 Dec	easyJet	direct
15 Dec - 19 Dec	easyJet	direct
10 Dec - 18 Dec	Vueling Airlines
10 Dec - 11 Dec	Vueling Airlines
17 Dec - 18 Dec	Vueling Airlines
30 Dec - 06 Jan	easyJet
29 Dec - 04 Jan	easyJet
12 Dec - 03 Jan	easyJet
25 Dec - 04 Jan	easyJet
27 Dec - 03 Jan	Lufthansa
26 Dec - 02 Jan	easyJet
30 Dec - 06 Jan	easyJet	direct
18 Dec - 04 Jan	easyJet
21 Dec - 04 Jan	easyJet
29 Dec - 03 Jan	easyJet

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 $88

Return flights