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

Return flights

10 Oct - 25 Oct	Air Transat	direct
07 Oct - 14 Oct	Lufthansa
01 Oct - 08 Oct	Lufthansa
08 Oct - 15 Oct	Lufthansa
14 Oct - 21 Oct	Lufthansa
15 Oct - 22 Oct	Lufthansa
22 Oct - 29 Oct	Lufthansa
29 Oct - 05 Nov	Lufthansa
06 Oct - 13 Oct	SWISS
13 Oct - 20 Oct	SWISS
21 Oct - 28 Oct	Lufthansa
27 Oct - 03 Nov	British Airways
30 Oct - 06 Nov	Lufthansa
26 Oct - 02 Nov	British Airways
25 Oct - 01 Nov	Air Transat
31 Oct - 07 Nov	Air Transat

Also check the deals for one-way flights from Montreal to Basel in October.

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 October from 523€

Return flights