Originally Posted by
3Cforme
That reference to K fares was for the U.S.(not Hawaii) + Canada. U.S.A. - Europe (or South America, or Asia) requires a Y, B or M fare + Delta miles on Delta. (A Y fare on any SkyTeam airline is also upgradeable with Delta miles.)
M fares can be 200% higher than the cheapest published L/U/T fare. Sorry, RobinPDX.
Thanks all for the explanation. I guess I am better off staying as an AS MVP/G. I never seem to use miles for B/F going to Europe where I go every year or two as it seems I need that flight to make Gold for the year. Can't seem to cough up the bucks to pay for B or F though.