How to Score Cheap Flights This Summer

"Being flexible opens up several different options of prices for customers still looking to travel this Summer," Spagnola tells travelers. Turn the "flexible" dates option on in your search; you might find substantial differences in fares by simply changing your arrival or departure date by one or two days.

If you don't already have a travel credit card, compare what credit cards are offering in terms of sign-on bonuses this season. Chances are — after spending a predetermined amount over the course of a few months — you can accrue enough miles to get an international ticket at no cost whatsoever.

Spagnola predicts a record-breaking travel season, especially on the weekends. So to avoid shelling out steep funds, avoid the peak travel days and try to fly in and out during the week.

Another option for finding cheap seats is to take advantage of the discounted basic economy fares many major carriers offer on international flights. You might lose certain amenities (like a checked bag, the ability to choose your seat beforehand, etc.), but if you can live without them, basic economy fares tend to be sold at slashed costs.

One way to lessen the burden and make international flights feel less expensive is to stretch out the payments over multiple months. Some sites even offer zero percent interest payment plans (like CheapAir's Summer Flight Finance program) so you won't need to pay a cent more than the cost of the ticket.