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

Return flights

03 Dec - 10 Dec	TAP
01 Dec - 08 Dec	British Airways
09 Dec - 16 Dec	British Airways
02 Dec - 09 Dec	British Airways
08 Dec - 15 Dec	British Airways
10 Dec - 17 Dec	British Airways
09 Dec - 14 Jan	British Airways
04 Dec - 11 Dec	British Airways
05 Dec - 12 Dec	TAP
06 Dec - 13 Dec	Air Transat
14 Dec - 21 Dec	British Airways
06 Dec - 18 Jan	British Airways
30 Dec - 06 Jan	British Airways
25 Dec - 01 Jan	British Airways
28 Dec - 06 Jan	British Airways
26 Dec - 02 Jan	British Airways
27 Dec - 03 Jan	British Airways
19 Dec - 02 Jan	British Airways

Also check the deals for one-way flights from Montreal 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 Montreal to Basel in December from $659

Return flights