How do I use a credit voucher from a different airline?

[Moochy]

How do I use a credit voucher from a different airline? I have a $500 credit voucher from delta but I want to use it on a american airlines flight.

 

[Spock]

How do I use a credit voucher from a different airline? I have a $500 credit voucher from delta but I want to use it on a american airlines flight.

I don't think they work that way. Delta flights only

 

[I'mRayFlyMe]

Hmmmmm, good luck with that, Moochy!