Cheapest return YUL–SJO flights, September

AirHint found the following cheapest return flights from Montreal (YUL) to San Jose (SJO) in September 2026 (see full year).

Return flights

06 Sep - 13 Sep Avianca
08 Sep - 15 Sep Avianca
14 Sep - 21 Sep Avianca
16 Sep - 23 Sep Avianca
09 Sep - 16 Sep Avianca
17 Sep - 24 Sep Avianca
21 Sep - 28 Sep Avianca
25 Sep - 04 Oct Avianca
27 Sep - 04 Oct Avianca
29 Sep - 06 Oct Avianca
10 Sep - 17 Sep Avianca
18 Sep - 25 Sep Avianca
22 Sep - 29 Sep Avianca
28 Sep - 05 Oct Avianca
26 Sep - 03 Oct Avianca
30 Sep - 07 Oct Avianca
25 Sep - 02 Oct Avianca
18 Sep - 02 Oct Air Transat direct
25 Sep - 02 Oct Air Transat direct
24 Sep - 01 Oct Avianca

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

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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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