Google has announced that they will be offering a best price guarantee on select flights booked from August 13th until September 2nd. If you book during this period certain flights will be marked as being eligible, if you book one of these flights Google will continually check to see if the price for that flight drops. If it does, you will be automatically refunded.
Google has been telling customers if prices for a specific flight are low/typical or high so this is really an extension of this and I suspect most flights will not be eligible for this price guarantee. Keep in mind you’ll also only get the discounted price if Google finds that lower price and not if it shows via another third party. I’ll definitely be keeping an eye out when this goes live.
Hat tip to VFTW