It says many of the major sites are now owned by two companies, either Expedia or Booking Holdings, owner of Booking.com, and formerly known as Priceline (the Priceline website still exists, but the name of the ownership group has changed).
For instance,Expediaowns its "competitors" Travelocity, Hotels.com, Orbitz and Trivago.
Consumers Checkbook says as a result, many of these sites tend to show the same hotel and airfare prices, because they are all going to the same database to get their results. So a room on one site for $149 tends to be $149 on almost every competing site, it claims.
How to find a lower price
Spending time entering all your info on multiple sites just to find the same airfare or hotel rates in the end is, apparently, a waste of time.
Consumers Checkbook says the dates of your trip make much more of a difference than which travel site you use to book the trip. So be sure to try different dates before you book.
Finally, when you decide on a place, check that hotel or resort's website directly.
You may find they have a better deal than any of the consolidators, especially if you become a member of their rewards program, and in that case you don't waste your money.
"Don't Waste Your Money" is a registered trademark of Scripps Media, Inc. ("Scripps").