Hey. I did the same thing today. I booked JetBlue, read about GoogleFlights, canceled JetBlue, booked through GoogleFlights, and saved $1,100! From $1838 for three of us to $774 through GoogleFlights-JetBlue. I called JB to see if everything worked. They confirmed my cancellation with full refund (within 24 hours) and confirmed my new, cheaper itinerary. I then checked my credit card statement online and it showed both charges pending. I called JetBlue and spoke with a representative and he assured me my first booking was canceled with a full refund and my follow-up booking was all set. He said that it will take 7-10 days for the cancellation to disappear from my pending charge, but assured me it was canceled and that $1838 was scheduled for a full refund on my credit card. Thanks to all the Disers, especially Schucraig, for saving me SO much money! These are the times the Disers shine and show their true colors! Great family to be a part of!