Labour Day in Mexico? Calgary to Los Cabos, Mexico - $213 roundtrip after taxes
September 3 to 10 from Calgary to Los Cabos, Mexico (SJD) has dropped to $213 roundtrip after taxes. The next cheapest flights are around $550 so it's a true 62% discount.
Try it on AirCanadaVacations.com (different from AirCanada.com)
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September 10-17 also looks to be available for the same price.