As of 2026-10-03: A Jack in the Box Sourdough Jack costs $5.79 to $9.79 across 2,037 US Jack in the Box restaurants, typically $7.69.
Which state has the cheapest Jack in the Box Sourdough Jack?
Louisiana is the cheapest state for a Jack in the Box Sourdough Jack (typically $6.29) and Hawaii the most expensive ($9.79). Drive Thru Index, 2026-10-03.
Where is the cheapest Jack in the Box Sourdough Jack?
The cheapest Jack in the Box Sourdough Jack in the US is $5.79 at 5410 Rowlett Rd, Rowlett, TX. (Drive Thru Index, 2026-10-03).
How these prices are measured
Every day we check the menu at every restaurant of each chain, through the same ordering app its customers use, and record each item's pickup price. Restaurants are compared on a basket of items every full-menu restaurant of that brand sells. An index of 100 is the brand's typical (median) restaurant in the country, so 95 means 5% cheaper and 110 means 10% pricier. Brands are only ever compared with themselves, never with each other.
Citing this data: Source: Drive Thru Index (https://drivethruindex.com/items/jack-in-the-box/sourdough-jack), prices checked 2026-10-03. You are welcome to quote any figure on this page.