The respective loyalty programs of Expedia, Vrbo, Hotels.com and other brands under the Expedia Group umbrella are to be unified into one service.
The company says all brands and products will be in the program, covering flights, hotels, alternative accommodation, car rentals, cruises and activities.
As a result of the move to combine all the programs together, customers will find their rewards "will be even more valuable," Jon Gieselman, president of Expedia Brands, claims.
Current members of the different programs will continue to earn rewards through the existing programs and the upgraded platform will be free to join for new customers.
Gieselman says: "Everything we do is in service to customers, creating travel products and features that are simple to use and even more rewarding for those who travel with us.
"We want our customers to get the most of their travel experiences, plain and simple."
Expedia Group claims the current loyalty programs have given members almost $10 billion in discounts through member-only deals and rewards.
Although it has yet to be heavily marketed as a unified program, Booking Holdings allows Booking.com's Genius loyalty program to be used across some of its other brands, such as Kayak.
Expedia Group has played with a number of initiatives over the years in its bid to enhance its loyalty programa and partnerships.
In August 2016, Red Lion became the first hotel chain to began displaying its discounted loyalty rates next to standard rates on Expedia and Hotels.com.
Customers were offered the cheaper loyalty rates as long as they agreed to join the hotel's membership program.
Those who already belonged to the hotel's program could claim the rate by signing in with their credentials during the booking phase.
Over the course of the first month, membership sign-ups more than quadrupled, claimed Red Lion at the time.
The changes to the loyalty program announced this week follows a major overhaul earlier this year by Expedia Group of its flaghsip Expedia.com brand.