Today Google's marketing research arm, Think with Google, unveiled its Travel Dashboard -- a free online tool that highlights recent and year-over-year trends based on Google data across the car rental, air, and hotel verticals in the United States.
The data has been designed to help marketers in planning their campaigns. It will be updated quarterly.
For instance, the travel dashboard shows that between January and June 2015, airline direct brand queries rose 19% year-over-year for Delta and 52% year-over-year for Allegiant Air. That's a sign that those airlines' search marketing, AdWords, and branding campaigns may be working.
For hotels, search volume on mobile devices increased 49% during the first half of the year, relative to same period a year earlier.
The gain for tours-and-activities was 47%, relative to the first half of 2014.
More air queries were coming from mobile, too -- up 32% year-over-year, as of March 2015, across all Google Data.
Drilling down for context
One of the travel dashboard tools lets any user select from 25 major US markets to find out where people were traveling between July and September 2014, according to Google's data.
For instance, people in San Antonio were visiting Las Vegas 21% more during that quarter than they were in the same period a year prior -- making Sin City the biggest gainer among destinations measured.
The site reveals where travelers were coming from. Columbus, Ohio, ("Go Buckeyes!") saw a 90% year-over-year increase in Chicagoans visiting.
The travel dashboard is looking at Google search data that shows where people in one location are searching for travel to another city. It's not data from Google Flights or Google Hotels metasearch tools, says a company spokesperson.
GO DEEP: The Travel Dashboard by Think with Google
MORE: This Air France ad is the top travel brand video of 2015, so far, says Google