Don't worry, we can remind you.
Your SkyMiles number is that 10-digit number that appears on your SkyMiles card. If you've forgotten or misplaced your SkyMiles number, call 800-323-2323 from within the U.S., the U.S. Virgin Islands, Puerto Rico, the Bahamas, and Canada. From all other areas, call your local reservations office.
You'll need to provide your current address and date of last account activity when you call.