Buy a single patty SONIC® Cheeseburger* Get a single patty SONIC® Cheeseburger** FREE. Redemption Instructions Log in to view the redemption instructions for this offer. Participating locations include: Sonic 2564 Ironwood Dr Sun Prairie, WI 53590 Phone: 608-825-0070 Map Sonic 1115 W Lincoln Hwy DeKalb, IL 60115 Phone: 815-901-0934 Map SONIC 590 Barrington Rd Streamwood, IL 60107 Phone: 630-372-7920 Map Sharing Options Share Offer Copy Link
