It's the one tool I always mention when people ask me how to find better flight prices.

This easy-to-use website can help you find the best possible price on airfare (and even hotels). It's one of the biggest weapons in our arsenal at TPG to help save money on travel. While TPG does offer deal alerts, if you are looking for a particular flight, destination, airline or routing, Google Flights is the way to find personalized deals.

Google Flights is where I almost always begin my search for new bookings. I come back to it, again and again, to book trips, see if prices have dropped and check if I can get a better deal.

Here's everything you need to know to use and master Google Flights.

What is Google Flights?

Google Flights is one of our favorite tools for finding deals on flights. It's an amazingly powerful flight search engine, and the best part is that it's easy to use. Google shows you nearly all available flights for a given search but doesn't force you to book with it.

Unlike Expedia, Orbitz, Tripadvisor or Kayak, it's not an online travel agency. Google is simply showing you what's available. Once you find the flights you like, you "click through" to actually book. You can choose to book directly with the airline or via a third-party OTA, but not Google itself.

One frustrating note is that Google Flights does not show Jetblue Airlines flights, so keep that in mind as you search.

What's new at Google Flights?

Google has introduced new features that suggest when prices are historically lowest and when you should book for maximum savings. Google has always shown you whether the price for a suggested flight itinerary is typical, low or high, but now it gives you even more data to consider.

DAILY NEWSLETTER

Reward your inbox with the TPG Daily newsletter

Join over 700,000 readers for breaking news, in-depth guides and exclusive deals from TPG’s experts

Email address

Sign up

By signing up, you will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy. You may unsubscribe at any time.

The tool will "let travelers know when airfares are expected to be lowest for booking their chosen dates and destination," according to Craig Ewer at Google.

For example, Google now shows me that a flight from New York to San Francisco in October is $93 cheaper than usual, and the typical range is between $245 and $415. In other words, it's a good time to book.

Price ranges for a flight from New York to San Francisco. GOOGLE FLIGHTS

But it gets even better. In some situations, Google will suggest alternate dates you should actually book the flight to save a few bucks.

Basics of Google Flights

The toolbar has additional features for trips, including things to do, hotels, vacation rentals and a shortcut to a cool tool called "Explore." However, we'll focus on using the tool to book flights for now.

All of the fields and drop-down menus on this page are relatively easy to decipher:

Departure (where you want to fly from)

Destination (where you want to fly to)

Date(s) of travel

Round-trip flights, one-way flights or multicity trips

The number of passengers (here's why you should search for a single ticket, even if you're traveling in a group)

Ticket class: economy, premium economy, business class or first class

If you know where you're going and when you want to be there, all you have to do is plug in that information and hit the blue search button.

For example, here are all the options I see when I search for flights from New York's John F. Kennedy International Airport (JFK) to San Francisco International Airport (SFO). You can search by destination or by airport code.

The cheapest option is sometimes to fly the return on a different carrier. However, Google Flights clearly indicates these will be two tickets purchased separately.

Often, Google will suggest remaining on the same carrier for both legs. In this instance, one of the flights is on JetBlue.

All elite perks and other loyalty benefits are honored on flights booked directly on the airline website via Google Flights. However, that may not be the case if you book via a third-party site. It pays to make sure you book directly with the airline if possible.

In this example, the cheapest option is for mixed tickets with multiple stops. Most people are not going to want to take that option. It involves booking through a third-party website with tickets on different airlines and multiple flights and layovers. No thanks.

Along with legroom, Google Flights will also indicate if Wi-Fi is scheduled to be available on your flight (and if it is free or available at a cost), if the plane has in-seat charging options, and if the flight offers entertainment like live TV or options to stream to your personal device.

On a flight longer than five hours, your devices may run out of juice. So, again, you may want to choose the product that best suits your needs rather than selecting a flight based entirely on price or carrier.

Know your emissions

With sustainability becoming an increasingly important topic in travel, Google Flights will let you know the approximate carbon emissions for your flight based on the route, aircraft type and seating classes.

Below are the search results for a flight from Los Angeles International Airport (LAX) to Tokyo's Narita International Airport (NRT). United Airlines operates a fuel-efficient Boeing 787 on this route, which would produce a lower-than-average 734 kilograms of carbon dioxide.

How to search by cheapest dates

Let's say I want to get from JFK to Los Angeles in September, but I'm not tied to any specific dates. Google Flights can help me find the best possible prices for that trip.

On the search page, I can see the lowest price for that particular day if I click on the calendar icon. Prices listed in green represent the lowest price available across all current dates, while the days highlighted in blue show which dates I've selected.

Another way to view the cheapest dates is to click the date grid option. This will again show the cheapest dates in green, and you can easily line up different outbound and inbound options to see if the cheapest dates work for you.

You'll often find that the cheapest flight isn't necessarily the best or most convenient route. Google will show you those lowest prices but prioritize better routes before it.

In this example, Google Flights is prioritizing slightly higher fares as the "best flights" search results because they include a full-size carry-on bag.

How to set a pricing alert for yourself

After all that diligent work, give yourself a pat on the back. You've likely found the best option for you.

Some people are ready to book immediately, but most of us might need a day or two to solidify our plans with our fellow travelers or with work. Never fear: Google will help you track your flight and even tell you when the price goes up or down.

Immediately above your search results, a little toggle reads "Track prices" (boxed in green in the screenshot above).

Click on that — and log in to your Google account if needed — and Google Flights will send updated pricing alerts directly into your inbox.

If you have booked a refundable or changeable fare, you may want to switch this on even after you've booked. You will be alerted if the price goes up or down, so you can feel comfortable knowing you are getting the best deal. You can see part of my list of flights I'm currently tracking in the screenshot below.