305 - 508 CAD
In general, when booking your flight to Calgary, April is the cheapest month on average.
Most flyers found that booking flight tickets 60 days in advance of their planned departure date is, on average, the best time to get cheap flights to Calgary.
From most locations, the cheapest flights to Calgary are found on a Wednesday. Booking a Sunday departure is usually the most expensive.
On average you can find the best deals on plane tickets to Calgary when looking for flights with morning departure times.