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

Return flights

30 Aug - 06 Sep	Porter Airlines (Canada) Ltd
07 Aug - 16 Aug	Arajet
11 Aug - 15 Sep	WestJet
15 Aug - 22 Aug	Arajet
22 Aug - 29 Aug	Arajet
19 Aug - 26 Aug	Arajet
21 Aug - 28 Aug	Arajet
26 Aug - 02 Sep	Arajet
29 Aug - 05 Sep	Arajet
07 Aug - 15 Aug	WestJet
08 Aug - 15 Aug	WestJet
28 Aug - 04 Sep	Arajet
12 Aug - 19 Aug	WestJet
14 Aug - 21 Aug	WestJet
18 Aug - 25 Aug	WestJet
27 Aug - 03 Sep	WestJet
25 Aug - 01 Sep	Porter Airlines (Canada) Ltd
31 Aug - 07 Sep	WestJet

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

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Cheapest return flights from Montreal to San Juan in August from 413€

Return flights