Fare predictions and notifications are coming.

By Christopher Tkaczyk
Updated October 18, 2016
Google Maps

This article originally appeared on TravelandLeisure.com.

Watching airfare for an upcoming trip is about to get even easier, just in time for the frenzied holiday travel season.

Google Flights, arguably one of the easiest search tools for finding low-cost airfare, is adding more features that will help travelers predict rising (or falling) airfares. Now fliers will be able to see when their quoted airfares are expected to expire—down to the number of hours before the price will rise again—and the expected fare change.

Additionally, if you’re watching a particular destination but don’t have any set dates in mind, Google Flights will suggest the best times to fly for the lowest cost, including alternative routes and schedules.

Google will be rolling out the changes in the coming weeks, according to a company blog post.

All this means Google is going head to head with Hopper, a leading farecasting app that uses historical flight prices, booking volume, and algorithms to predict the best windows for traveling.

If you don’t immediately see the fare predictions on Google Flights, be patient. The rollout will take a few weeks, a Google spokesperson told Travel + Leisure.

Google Flights is a browser-based application that’s optimized for mobile—not an app. Google has not yet announced plans to create a stand alone Google Flights app for iOS and Android, so travelers will still need to access it via their browsers.