Which state has the cheapest Jack in the Box Small Diet Coke?

Idaho is the cheapest state for a Jack in the Box Small Diet Coke (typically $2.29) and Hawaii the most expensive ($3.39). Drive Thru Index, 2026-10-05.

Where is the cheapest Jack in the Box Small Diet Coke?

The cheapest Jack in the Box Small Diet Coke in the US is $1.99 at 2720 W Northwest Hwy, Dallas, TX. (Drive Thru Index, 2026-10-05).

Jack in the Box Small Diet Coke price

Name: Jack in the Box Small Diet Coke Price (2026): by State and City | Drive Thru Index
Creator: Drive Thru Index
License: https://drivethruindex.com/insights#citing

A Jack in the Box Small Diet Coke costs $1.99 to $3.99 across 2,007 US Jack in the Box restaurants, typically $2.79.

Pickup prices at every Jack in the Box as of 5 October 2026.

Key findings

A Jack in the Box Small Diet Coke costs $1.99 to $3.99 across 2,007 US Jack in the Box restaurants, typically $2.79.
Idaho is the cheapest state for a Jack in the Box Small Diet Coke (typically $2.29) and Hawaii the most expensive ($3.39).
The cheapest Jack in the Box Small Diet Coke in the US is $1.99 at 2720 W Northwest Hwy, Dallas, TX.
Among cities with at least 3 Jack in the Box restaurants, Garland, TX has the cheapest Jack in the Box Small Diet Coke, typically $1.99.

Small Diet Coke price by state, cheapest first

Rank	State	Typical	Range	Index	Restaurants
1	Kentucky	$1.99	$1.99 to $2.49	71	4
2	Idaho	$2.29	$2.19 to $2.29	82	33
3	Missouri	$2.29	$2.19 to $2.39	82	29
4	Illinois	$2.29	$2.29 to $2.39	82	19
5	North Carolina	$2.29	$2.29 to $2.29	82	16
6	Oklahoma	$2.29	$1.99 to $2.79	82	15
7	Louisiana	$2.29	$2.29 to $2.29	82	10
8	South Carolina	$2.29	$2.29 to $2.29	82	5
9	Tennessee	$2.29	$2.29 to $2.29	82	4
10	Florida	$2.29	$2.29 to $2.39	82	2
11	Ohio	$2.29	$2.29 to $2.29	82	2
12	Michigan	$2.29	$2.29 to $2.29	82	1
13	Arkansas	$2.29	$2.29 to $2.29	82	1
14	Nevada	$2.39	$2.19 to $2.79	86	78
15	Colorado	$2.39	$2.39 to $3.29	86	13
16	Texas	$2.49	$1.99 to $3.39	89	487
17	Oregon	$2.50	$2.29 to $2.90	90	40
18	Utah	$2.69	$2.59 to $2.69	96	19
19	New Mexico	$2.79	$2.29 to $2.79	100	8
20	Indiana	$2.89	$2.29 to $2.89	104	5
21	California	$2.99	$2.39 to $3.99	107	902
22	Arizona	$2.99	$2.39 to $3.29	107	162
23	Washington	$3.19	$2.29 to $3.29	114	124
24	Hawaii	$3.39	$2.99 to $3.49	122	28

Cheapest cities for a Small Diet Coke

City	Typical	Range	Restaurants
Garland, TX	$1.99	$1.99 to $2.29	6
Fort Worth, TX	$1.99	$1.99 to $2.29	5
Plano, TX	$1.99	$1.99 to $2.29	4
Louisville, KY	$1.99	$1.99 to $2.29	3
Richardson, TX	$1.99	$1.99 to $1.99	3
Carrollton, TX	$1.99	$1.99 to $2.39	3
Oklahoma City, OK	$2.19	$2.19 to $2.39	5
Spokane, WA	$2.29	$2.29 to $2.29	9
Boise, ID	$2.29	$2.29 to $2.29	9
Charlotte, NC	$2.29	$2.29 to $2.29	7

Priciest cities for a Small Diet Coke

City	Typical	Range	Restaurants
Campbell, CA	$3.99	$2.99 to $3.99	4
Visalia, CA	$3.69	$3.69 to $3.69	8
San Francisco, CA	$3.59	$3.59 to $3.59	3
Livermore, CA	$3.49	$3.49 to $3.49	3
Bakersfield, CA	$3.49	$3.19 to $3.69	22
Waipahu, HI	$3.39	$3.39 to $3.39	3
Honolulu, HI	$3.39	$3.19 to $3.39	11
Elk Grove, CA	$3.29	$3.29 to $3.29	3
Roseville, CA	$3.29	$3.29 to $3.29	3
Lodi, CA	$3.29	$2.99 to $3.29	3

Cheapest Jack in the Box restaurants for a Small Diet Coke

Restaurant	Where	Price
2720 W Northwest Hwy	Dallas, TX	$1.99
6241 Rufe Snow Dr	Watauga, TX	$1.99
1290 William D Tate Ave	Grapevine, TX	$1.99
18220 Dallas Pkwy	Dallas, TX	$1.99
3355 Harwood Rd	Bedford, TX	$1.99

Priciest Jack in the Box restaurants for a Small Diet Coke

Restaurant	Where	Price
1737 S Bascom Ave	Campbell, CA	$3.99
1450 W Campbell Ave	Campbell, CA	$3.99
2197 San Pablo Ave	Berkeley, CA	$3.99
510 W Hamilton Ave	Campbell, CA	$3.99
1400 N Ben Maddox Way	Visalia, CA	$3.69

More Jack in the Box menu prices

Questions people ask

How much is a Jack in the Box Small Diet Coke?: As of 2026-10-05: A Jack in the Box Small Diet Coke costs $1.99 to $3.99 across 2,007 US Jack in the Box restaurants, typically $2.79.
Which state has the cheapest Jack in the Box Small Diet Coke?: Idaho is the cheapest state for a Jack in the Box Small Diet Coke (typically $2.29) and Hawaii the most expensive ($3.39). Drive Thru Index, 2026-10-05.
Where is the cheapest Jack in the Box Small Diet Coke?: The cheapest Jack in the Box Small Diet Coke in the US is $1.99 at 2720 W Northwest Hwy, Dallas, TX. (Drive Thru Index, 2026-10-05).

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/small-diet-coke), prices checked 2026-10-05. You are welcome to quote any figure on this page.