The study was conducted in partnership with the Airlines Reporting Corporation (ARC) and revealed a surprising change in the best time of the week to book a flight.
Previously, reports pointed to Tuesday being the best day, but the data from 2015 has revealed that on average, weekends now provide the best opportunity for finding great price deals.
While Tuesday is still close behind, the study indicates that weekend searches are yielding cheaper flights since these are the days on which most leisure travelers purchase tickets, while businesses travelers often book flights during the week (which can raise ticket prices on average).
Airline fares revolve in a rapidly changing market, which is why Expedia and ARC advice that travelers keep their eye out for great deals.
To see the full study, which also revealed information on how far in advance to book certain flights and the cheapest expected flight routes of the year, click here.