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

Return flights

18 Apr - 25 Apr	United
14 Apr - 21 Apr	United
08 Apr - 15 Apr	United
15 Apr - 22 Apr	United
28 Apr - 05 May	United
12 Apr - 19 Apr	Air Canada
24 Apr - 01 May	United
11 Apr - 18 Apr	Air Canada
22 Apr - 29 Apr	United
04 Apr - 11 Apr	United
05 Apr - 12 Apr	United
19 Apr - 26 Apr	United
27 Apr - 04 May	United
26 Apr - 03 May	United
25 Apr - 02 May	WestJet
30 Apr - 07 May	WestJet

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 243€

Return flights