If your budget has first priority, several tips will secure you the cheapest flight tickets. If you’re flying with a low cost carrier, not checking in bagage will check save you around 20-30 pounds. Travelling light with cabin baggage only is cost effective. If you can be flexible with your departure and arrival times, this will save you money as well. Cheap flights are priced based on supply and demand. If you don’t mind travelling very early or late, that’ll grant you a discount for your ticket.
Also, be sure to buy your tickets 4-6 weeks before departure.