Try booking a flight on Friday the 13th. Weird enough, it is the cheapest day to fly, if you are not afraid.
There are plenty of ways to get your tickets in the best price in which i would first suggest you to check with the discount offers that are available from the multiple travel portals. Travel portals are offering great discounts on bookings so you can check the coupons as well as additional discounts like discounts on cards, app and other.
Whenever you are going to book the tickets make sure that you consider checking travel offers, coupons available in multiple stores then select the best offer from that selected. By applying that offer you will be getting your ticket in the budget.