About to go Across Pond, which Program do I Use?
I've been with UA program for a long time, but now the least expensive fare to go across the pond to Europe is with CO. I have 0 miles with them but I am wondering which of the 2 programs would give me more miles. This is the Fare Basis Code WH4NCE. Should I give UA Mileage # when I purchase ticket or CO? THis is for the end of June!!!
Thank you