06/26/2026
just in the nick of time ⏰
Jack in the Box
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Jack in the Box is a fast food and burger restaurant located on Sierra Avenue that prides itself in serving a variety of dishes, including burgers, tacos and egg rolls. With unique items like their own strains of Pineapple Express and special treats available, there's always something to indulge in at Jack in the Box.
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Address
3910 Sierra Avenue
Fontana, CA
92336
To get to the location on Sierra Avenue in Fontana, if you're commuting via public transportation, take the bus to the stop at Sierra Ave and Miller Ave. From there, walk north on Sierra Avenue for two blocks until you reach your destination.
If you're driving, take I-10 and exit at Sierra Ave. Head south on Sierra Avenue for about a mile and a half until you reach the address. There is parking available in the lot adjacent to the restaurant.
Opening Hours
| Monday | 12am - 12am |
| Tuesday | 12am - 1:30am |
| 4am - 1:30am | |
| Wednesday | 4am - 1:30am |
| Thursday | 4am - 12am |
| Friday | 12am - 12am |
| Saturday | 12am - 12am |
| Sunday | 12am - 12am |
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What people say
Fast food restaurants are a go-to for those who want quick and satisfying meals. Jack in the Box, located on Sierra Avenue in Fontana, is one such restaurant that offers a wide range of delicious options. From burgers to tacos to egg rolls, Jack in the Box has something for everyone.
Customers have taken to social media to express their love for this fast food joint. One customer couldn't decide what to get, so they got it all! Another customer uses the same jar to buy more Jack in the Box. The restaurant's dessert options are also a hit with customers debating whether to have dessert for breakfast or breakfast for dessert.
Jack in the Box also offers great deals and promotions. For instance, customers can celebrate their birthdays with two free tacos with a $1 purchase on the app or online. Additionally, customers can enjoy 2 tacos for just $0.99 when they order on the app or online.
The Pineapple Express family is another popular item at Jack in the Box. Customers can choose from a Shake, Red Bull Infusion, and Chicken Sandwich - all infused with pineapple flavor. The large Pineapple Express Shake was available for just $4.20 through an app or online order on 4/20.
Overall, Jack in the Box is a great fast food restaurant that offers tasty food and exciting promotions that keep customers coming back for more.