Domino’s Pizza deal: half off regular price on all pizzas ordered online. The discount deal is through Sunday, August 12th only, and only for pizza, not for other Domino’s menu items you might also order. Use the code “50off” at checkout to enjoy the offer. And make mine pepperoni. The deal is being advertised widely on TV this week, but if you aren’t watching TV, or zapping through the commercials, you would miss it.