Round Trip Airfares from San Diego to Calgary for $236

American, Delta Air Lines, and Expedia have round trip flights from San Diego to Calgary for $236. This is a discounted fare from the original price of $309, providing a savings of $73. The deal includes basic economy tickets with limited baggage and no seat selection, valid for select dates in September 2026. To book, use Expedia and select your travel dates within the specified window. This fare is competitive for the route and dates but is limited in flexibility and amenities. It represents a solid discount, especially given the historical price of around $309.