Even if you use credit card rewards to cover the cost of your travel, there are instances when paying money is preferable.

Say you can't find an award flight on your preferred travel date or the cash cost yields a low value for your miles. In situations like these (and others), you may want to save your rewards and purchase a ticket outright.

Nevertheless, regardless of how much you pay, you want to get the best deal. Google Flights can help. So, let us show you how to set Google Flights alerts and book the cheapest flight possible.

What is Google Flights?

Google Flights is an online flight search tool run by — you guessed it — Google. The tool lets you search for plane tickets quickly, check price history, and track prices for specific flights.

Google Flights is a must-use tool for any traveler, whether you're a frequent flyer or a casual vacationer.

What is a Google Flights alert?

A Google Flights alert informs you when a flight's price changes, whether it increases or decreases. To use the money-saving feature, set up a tracker for a particular route that includes all flights that day.

If you're watching specific flights, it's possible to set up a tracker for each flight that fits your schedule by clicking on "Track prices" once the exact flight has been selected.

If you prefer just one or two specific departures, it's best to set trackers just for those flights to avoid seeing price changes for all flights that day.

Additionally, if your dates are flexible, click on "Any dates." This will enable you to receive price change notifications for flights on specific days whenever prices on this route are low within a month of your chosen travel dates.

How to set Google flights alerts

Enter your flight information

To use one of the best features of Google Flights, you'll always start with the first step — search for the flight you want to track. So, go to Google Flights and enter your search parameters, such as:

Flight origin and destination.

Travel dates.

Class of service.

The number of travelers.

Whether you're traveling round-trip, one-way or multi-city.

Switch on the flight tracker button

Once the search results appear and you don't like the prices you see, you can set the tracker for any given flight or route you prefer to take in the future.

To do this, toggle the "Track prices" to the "on" position, and it'll activate the flight tracker tool. That's it.

Because the notifications are sent to your email, you must have a Gmail email account and be logged in through that account to receive the price change alerts from Google Flights.

View tracked prices

Any time you want to review the tracked flights you've set up, go to Google Flight's main page and you will find the existing trackers visible below the search fields.

You also can access them from your Google Travel dashboard. If you've set up more than three alerts, click on "View all" to see them all.

This is also where you can view a tracked flight's history and the price changes over the past several months, with increases and decreases shown in the graph.

If the price has decreased and you're ready to book the flight, click "See booking options" and proceed with the reservation.

If you're no longer interested in tracking a particular route or flight, click the small trash bin icon in the bottom left corner to remove it from the list.

Keep an eye on your email

You'll receive an email as soon as the price significantly changes in either direction. You'll also receive an email notification when Google thinks the price will likely increase.