TripAdvisor has persuaded another of the global hotel giants to join its Instant Booking service: InterContinental Hotels Group.
The group's portfolio of brands will now be available, allowing users to search and select a hotel on its metasearch platform but secure the reservation on-site (with the hotel retaining the merchant of record rights).
Brands in the agreement include the InterContinental, Kimpton, Crowne Plaza, Holiday Inn and Staybridge Suites.
IHG has 5,200 hotels under its wing in some 100 countries around the world.
The addition of IHG comes nearly four months on from Hilton's inclusion in the programme.
Other chains on the service include Marriott, Accor, Best Western and Wyndham Worldwide.
IHG was one of the "watch and see" contingent of groups that had initially declined the opportunity to become part of the Instant Booking wave.
TripAdvisor signed a major agreement with Expedia Inc in December last year to have its roster of online travel agency-hosted properties available through Instant Booking.
Booking.com (part of the Priceline Group) signed its own deal with TripAdvisor in October 2015.
TripAdvisor, which has seen the initiative take a number of years to hit a decent level acceptance by the hospitality world, will be hoping that the gradual addition of the major chains will trigger the beginnings of a turnaround in its financial performance (Instant Booking has been blamed for some lacklustre results in recent years).
TripAdvisor's senior vice president of global advertising, Robin Ingle, says:
"Trusted hotels, like those within the IHG family of brands, give hotel shoppers confidence that they’ll be able to have a better booking experience through TripAdvisor because of the wide range of inventory, room content and the best rates we offer."