The Office of Fair Trading (OFT) has accepted formal commitments regarding price parity by InterContinental Hotels Group (IHG), Booking.com and Expedia.
The announcement means that online travel agents (OTAs) and hotels will be able to offer discounts on rates for hotel rooms.
The commitments mean that all OTAs and hotels that deal with IHG, Booking.com and Expedia will be able to offer discounts off headline room-only rates, as long as:
• customers sign up to the membership scheme of an OTA or hotel to be able to view specific discounts, and
• customers make one undiscounted booking with the OTA or hotel in question to be eligible for future discounts
The discounts offered by OTAs will be funded through their commission or margins.
Ann Pope, senior director in the OFT's services, infrastructure and public markets group, said: "The travel industry, fuelled by the internet, has seen significant changes in recent years, and we want to ensure those changes continue to work in consumers' interests.
"That is why we are pleased to have secured this outcome which, by allowing OTAs and hotels to offer discounts, should increase competition and mean travellers across Europe can benefit from reductions on hotel accommodation throughout the UK. By shopping around, people can compare the different discounts offered by hotels and OTAs, and ensure they get the best deal."
The OFT launched its investigation following concerns that Booking.com and Expedia each entered into separate agreements with IHG that restricted each OTA's ability to discount the rates at which room-only hotel accommodation bookings are offered to consumers.
The commitments address these concerns by allowing greater competition on price between OTAs, and also between OTAs and hotels, said the OFT.
It added that they should also enable new online agents to enter the market or expand by offering attractive discounts.
Following acceptance of the commitments, the OFT has now closed its investigation.