Go to Google Flights. In the top left, click Menu Tracked prices. To see flights you’re tracking, click a saved route. To turn tracking emails on or off, click the switch next to "Email notifications.".Where can I buy cheap flights tickets?
If you don't mind putting in a little more work, visit the cheapest airline's website after you've compared it with others on an aggregator site. Some airlines will offer special deals and discounts if you buy tickets directly from the site. Popular flight aggregator sites include Priceline, Travelocity, and Expedia.