I got a bit over excited and booked my airfare wrong this morning. 
I should have booked Friday morning and Monday night, what I actually booked was Monday morning and Monday night.
So now I know I can cancel the morning flight and rebook it for Monday. The question is how long is the credit good for? If by some miracle I have any credit left over from my April trip will it still be good in mid October?
Thanks!

I should have booked Friday morning and Monday night, what I actually booked was Monday morning and Monday night.

So now I know I can cancel the morning flight and rebook it for Monday. The question is how long is the credit good for? If by some miracle I have any credit left over from my April trip will it still be good in mid October?
Thanks!