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

Return flights

09 Dec - 11 Dec	easyJet	direct
09 Dec - 10 Dec	easyJet	direct
08 Dec - 11 Dec	easyJet	direct
07 Dec - 11 Dec	easyJet	direct
07 Dec - 10 Dec	easyJet	direct
11 Dec - 14 Dec	easyJet	direct
12 Dec - 14 Dec	easyJet	direct
04 Dec - 07 Dec	easyJet	direct
01 Dec - 03 Dec	easyJet	direct
08 Dec - 13 Dec	easyJet	direct

Also check the deals for one-way flights from Porto to Basel 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 Porto to Basel in December from 79€

Return flights