Originally Posted by jsloan

FFC from an unused ticket should be available -- and combinable -- during the purchase flow. Start the purchase of a new ticket, get to the payment page, and see if you can use the credit. If you can, then you should be able to create FFCs from travel bank and travel certs by purchasing additional tickets for the same traveler, then using them via this same process. However, if it tells you that you're unable to use your travel credit on that particular page, then you won't be able to combine them.