Delta Companion Certificates are issued each year during the month in which you renew your credit card. Certificates are generally valid for 13 months from the date of issue. You must book and complete travel by the date printed on the certificate.

The validity of a companion certificate depends heavily on the issuing airline or credit card, but most typically last for 12 months from the date of issuance. For example, the Delta SkyMiles Companion Certificate must be used for travel that is completed by the expiration date printed on the certificate. Similarly, the Alaska Airlines Famous Fare certificate is usually valid for one year. In contrast, the Southwest Companion Pass operates differently; once earned, it is valid for the remainder of the year in which you qualified plus the entire following calendar year. In 2026, some programs like Air Canada's Aeroplan have shifted toward certificates that require the booking to be made before the expiry, even if the travel occurs later. Always check the specific "Book By" vs. "Travel By" language in your account, as missing these deadlines by even a single day usually results in the total forfeiture of the benefit with no option for extension.