Cheapest return flights from Montreal to San Juan in September from $357

Best time to book flights for Montreal (YUL) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest return flights from Montreal (YUL) to San Juan (SJU) in September 2025 (see full year).

Return flights

30 Sep - 07 Oct United
16 Sep - 23 Sep United
22 Sep - 29 Sep United
24 Sep - 01 Oct United
06 Sep - 13 Sep United
14 Sep - 21 Sep United
27 Sep - 04 Oct Porter Airlines (Canada) Ltd
03 Sep - 10 Sep Porter Airlines (Canada) Ltd
08 Sep - 15 Sep United
20 Sep - 27 Sep United
15 Sep - 22 Sep United
04 Sep - 11 Sep Porter Airlines (Canada) Ltd
09 Sep - 16 Sep WestJet
25 Sep - 02 Oct WestJet
26 Sep - 03 Oct WestJet
28 Sep - 05 Oct WestJet

Also check the deals for one-way flights from Montreal to San Juan in September.

Skyscanner

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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