Originally Posted by
FlyerAVL
IIRC they are all just front ends for Expedia(AMEX/CITI),
American Express Travel (USA) is currently outsourced to Expedia, but the others are not.
Capital One uses Hopper
Chase uses cxLoyallty (which is owned by Chase)
Citi uses Booking.com
The hotel business is fundamentally different than the airline business in that Consolidators buy large blocks of room nights at a substantial discount.When you book a hotel stay though an agency you are often buying from a Consolidator's inventory. Expedia and Booking are Consolidators. cxLoyalty and Hopper are not, but they often fulfill room nights through Consolidators.