Recent social media posts
09/03/2026
$500 isn't the only thing I'm giving away 👀
For any students surviving on a budget, I've got you:
⚡ $1 Breakfast Jack® w/ order of a Red Bull® Can or Infusion
⚡ $1 Red Bull® w/ order of a Breakfast Croissant
⚡ Free regular-size fries (Curly or French) or dessert w/ order of a Red Bull Infusion
Offers valid 1x per week (Mon.-Sun.) for new and existing Jack Pack Rewards members. Available only in the Jack App. Dessert excludes shakes.
09/01/2026
the fortune doesn't lie 🥠 get 2 tacos for $.75, no purchase requirement, in-app only for one day only
09/01/2026
Donate $1 to No Kid Hungry at Jack in the Box and get a free small curly fry on your next visit.
08/31/2026
Get Free 2 Tacos w/ $1 minimum order
1x only on 8/31 only on the Jack App
08/28/2026
nothing better than tacos unless it's more tacos. 🌮
08/27/2026
Did you catch everything revealed today? If not, Jack delivers.
08/26/2026
The universe gave you a week-long head start. 🛸
Don't waste it.
Cosmic Cheeseburgers are only at my 1220 Centinela Ave, Inglewood, CA location through September 2. 🌌🍔
08/24/2026
Early class. Low battery. We got you. ⚡
Pair any Red Bull Can or Infusion with a Breakfast Jack for just $1 in the Jack App.
Valid 1x per week.
08/21/2026
friends = me, myself, and I
08/20/2026
What's more whimsical than my new Cosmic Cheeseburger? 🛸🪐🌟 Available for 2 weeks only at 📍1220 Centinela Ave, Inglewood, CA 90302
08/19/2026
body: resurrected
12/13/2018
Click here for great offers and stuff!
Burgers. Breakfast. Tacos and more. All of Jack’s favorite things in one place.
Address
8134 Sierra Avenue
Fontana, CA
92335
Directions to Sierra Avenue in Fontana:
By Public Transport:
1. Take the bus to the Sierra Ave & Valley Blvd station.
2. Alight at the station and walk east on Valley Blvd towards Valencia Ave.
3. Turn left onto Sierra Ave and continue walking until you reach your destination.
By Car:
1. Head south on Sierra Ave towards Valencia Ave.
2. Continue straight until you see a parking lot on your right or left, where you can park your car.
3. If you miss the parking lot, make a U-turn and take the first right into the parking lot.
Please note that these directions are for informational purposes only and should be used in conjunction with a current map or GPS device for optimal accuracy.
Alerts
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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 fast food options. From burgers to tacos to egg rolls, Jack in the Box has something for everyone.
Customers rave about the variety of menu items available at this location. One social media post even shows a customer who couldn't decide what to get, so they got it all! Another post showcases a jar filled with money saved specifically for more visits to Jack in the Box.
The restaurant also offers great deals and promotions through their app and online ordering system. Customers can celebrate their birthdays with 2 free tacos with a $1 purchase, or get 2 tacos for just .99 cents when ordering through the app or online.
Jack in the Box is always innovating and introducing new menu items as well. The recent addition of jack wraps has customers excited, and the Pineapple Express family (including a shake, Red Bull infusion, and chicken sandwich) was a hit during its limited time offer.
Overall, Jack in the Box on Sierra Avenue in Fontana is a great choice for those looking for tasty fast food options with plenty of variety and great deals.
