AirHint found the following cheapest return flights from Montreal (YUL) to San Juan (SJU) in October 2026 (see full year).

Return flights

22 Oct - 29 Oct	United
20 Oct - 27 Oct	United
24 Oct - 31 Oct	United
21 Oct - 28 Oct	United
23 Oct - 30 Oct	United
01 Oct - 08 Oct	WestJet
03 Oct - 10 Oct	WestJet
13 Oct - 20 Oct	WestJet
14 Oct - 21 Oct	WestJet
15 Oct - 22 Oct	WestJet

Also check the deals for one-way flights from Montreal to San Juan 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 San Juan in October from 333€

Return flights