.50¢ Grilled Cheese Sandwich at Sonic on November 15, 2017MomFaveNovember 14, 20170 viewsDealsRestaurantsSonic0 Comments0 views 00 min read On November 15, 2017 Sonic is offering their Grilled Cheese sandwich at just .50¢. This deal is good all day, so be sure to stop by and feed the family at a fraction of the typical cost of eating out. Find a location near you. The links in this post may be affiliate links. Read our disclosure policy here.