Win the direct booking before the OTA does
Every room sold through an OTA is a guest you rented, not one you own. The direct channel is worth designing for — fiercely.

The booking goes to Booking.com, the commission goes to Booking.com, and the guest's email goes to Booking.com. You keep the bed-making. That's the deal most hotels quietly accept — not because they want to, but because their own website never gave the guest a reason to stay.
OTA leakage is a design failure, not a fact of life
Here's how it usually goes. A guest discovers you on an OTA, then opens a second tab to check your own site — a behaviour known as the billboard effect. They land on a page that's slower, vaguer, and harder to book than the OTA they just left. So they go back and book where it was easy. The OTA earned its cut by being better at the last ten seconds.
That's not loyalty to the platform. It's friction on your side.

The direct channel is the only one you own
A direct booking gives you the margin, the data, and the relationship. The same guest, booked direct, costs you nothing in commission and hands you the email to bring them back. Metasearch — Google Hotel Ads, Tripadvisor — is now one of the strongest paths into that direct channel, but it only pays off if the site it points to closes.
You don't beat the OTA on reach. You beat it on the ten seconds where the guest decides.
So design for those ten seconds. Match the OTA's price transparency. Beat its speed. Make the direct path the obvious one — a clear rate, a real benefit for booking direct, no detour to a third-party widget that breaks the spell.
The OTA will always be there, and that's fine — let it bring the guest. Just make sure your own site is the one that's ready to close.