Need Help - Discount Over International Flight Ticket

Hello Everyone

I am going to Calgary (Canada) on 15th July 2017 and will return on 31st August. Everyone please recommend me some cheap way to book the tickets. The discount coupouns of various websites are also welcomed. Please send me any international discount coupoun if you have to book a flight.

Thankyou Everyone in Advance

Please neglect any mistake as this is my first ever post.