I now realize that both CO and Delta are part of SkyTeam and I just racked up about 6K on CO. Can I get it switched to Delta miles, in order to use for a future Delta flight, or will I be greatly penalized.
Also, if I want to plan on a future flight that looks like it is codeshared by Delta and Air France, should it matter which of those I accumulate mileage with?
Sort of a newbie
karendor