Today I'm not talking about miles or points, but instead a new way to find the cheapest flights to book with cash. A savvy miles ninja knows when to use miles versus when to pull out the dollar bills, after all.

Until September 2, look out for this little symbol in the search results of Google Flights:

It means that Google predicts this flight is priced as low as it will go, and if you book it and the price drops more than $5, they will refund you the difference up to $500.