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

Return flights

10 Dec - 12 Dec	easyJet
17 Dec - 20 Dec	easyJet
15 Dec - 21 Dec	easyJet
26 Dec - 31 Dec	easyJet
05 Dec - 07 Dec	easyJet
20 Dec - 27 Dec	Ryanair
18 Dec - 22 Dec	easyJet
19 Dec - 22 Dec	easyJet
23 Dec - 26 Dec	easyJet
18 Dec - 21 Dec	easyJet
30 Dec - 02 Jan	easyJet
29 Dec - 02 Jan	easyJet

Also check the deals for one-way flights from London 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 London to Basel in December from $218

Return flights