The one-day offer is for a regular Portillo's Chicago-Style Hot Dog for $1 when customers purchase any sandwich, entree salad or ribs, while supplies last.
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The deal is only available for dine-in or drive-thru customers, and does not apply to online or catering orders.
America's Dog & Burger is also offering $1 dogs at all of their locations July 19. Customers are limited to one hot dog per person, and certain restrictions apply.
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The National Hot Dog and Sausage Council designated July 19 as National Hot Dog Day, and July overall as National Hot Dog Month.