Which fare classes are eligible for miles upgrades?
Hi everyone,
I normally fly UA and AA and I am not at all familiar with the rules of DL's Skymiles program. I have some points with AMEX' membership rewards and I considering transferring them over to DL.
I see from DL's website that for 12,500 miles I can get a domestic first class upgrade "from select fares." The website does not mention what these fares are. Does anyone know which booking classes are eligible for domestic upgrades?
Thanks!