Set the stay details
Enter the destination, dates, guests and rooms you need.
Hotels
Enter the stay once. Your dates, guests and rooms travel with you to the supplier, so nothing needs entering twice to see real availability.
Start here
Use the same details you will check with the supplier.
Check the search details
Enter the destination, dates, guests and rooms you need.
The supplier search opens with the destination you entered.
Booking.com shows current properties, prices and availability.
Your dates, guests and rooms travel with you to the supplier, so the page that opens is a result list for your trip rather than a form for a city. Availability and price are decided there, live, because a cached room rate is worth nothing the moment somebody else books the room.
City tax, resort fees and cleaning are added at different points depending on the country and the property. Compare the total at checkout rather than the headline rate, and check whether breakfast is included before deciding one place undercuts another.
A refundable rate normally costs a little more than a prepaid one. On a trip whose dates might still move, that gap buys the ability to rebook when a flight changes, which is regularly cheaper than losing a whole night.
A four star hotel forty minutes out will cost you two taxi fares a day and the willingness to go back to it. Check where a property actually sits against the things you plan to do before comparing anything else.