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Air Canada via DealBase offers Air Canada 1-Way International Flights from select cities in the U.S. with fares starting from $88.47. (On the DealBase landing page, click "Air Canada" in the top line to see this sale.) That's the lowest price we could find for select routes by at least $4. This price is valid on flights from Portland, OR (PDX), with arrival in Calgary, Canada, (YYC) on May 13. Book this travel deal by April 4 for travel from April 22 through June 30. Prices, dates, and booking details were valid at the time of publication.