Delta wow I can’t believe delta on numerous occasions I have been charged with transferring miles, changing flights. One time I had a flight booked to Italy and delta put me on hold. After they came back on the phone to take my credit card info to book the flight they said it was no longer available for that price. Delta Airlines told me they would have to charge me another 650 dollars to book the flight. needless to say I had to book through another airlines because I felt screwed by they way the handled themselves.