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

Return flights

21 Apr - 28 Apr	United
15 Apr - 22 Apr	United
29 Apr - 06 May	United
11 Apr - 18 Apr	Air Canada
27 Apr - 04 May	United
25 Apr - 02 May	United
12 Apr - 19 Apr	Air Canada	direct
05 Apr - 12 Apr	Air Transat
07 Apr - 14 Apr	United
23 Apr - 30 Apr	WestJet
01 Apr - 08 Apr	United
19 Apr - 26 Apr	United
16 Apr - 23 Apr	United

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

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 April from $385

Return flights