I actually had this same question after a trip got canceled last year. I had a Delta flight credit sitting in my account and wasn’t sure if I could use it for an international flight. Turns out, you can! I used mine to book a flight from Atlanta to Paris without any issues. I did call 877-764-3622 beforehand just to double-check the details, and the rep confirmed the credit worked the same way abroad as it does for domestic flights. They even helped me apply it right over the phone, which made things super easy. So yes—if you’ve got a Delta credit, you can definitely use it internationally.