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
10110 Sierra Avenue
Fontana, CA
92335
To get to Sierra Avenue in Fontana by public transport, take the Metrolink train and get off at the Fontana station. From there, take the route 82 bus towards Kaiser Hospital and get off at Sierra Avenue. Walk a few blocks down Sierra Avenue and you will reach your destination.
If you prefer to drive, take the I-10 freeway and exit at Sierra Avenue. Turn left onto Sierra Avenue and continue driving for approximately one mile. You will see the fast food restaurant and burger restaurant on your right-hand side.
There is ample parking available near the restaurants if you choose to drive.
Alerts
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What people say
Fast food restaurants are a go-to for those who crave quick and delicious meals. And when it comes to fast food, Jack in the Box on Sierra Avenue in Fontana is definitely a crowd favorite. This burger restaurant offers a wide variety of menu items that cater to all kinds of cravings, from burgers to tacos to egg rolls.
What's great about Jack in the Box is that they always have something new and exciting to offer. Their social media posts showcase their latest menu items, like the Pineapple Express family which includes a Shake, Red Bull Infusion, and a Chicken Sandwich. And let's not forget about their famous 2 for .99 tacos deal which is available when you order on the Jack app or online.
But what sets Jack in the Box apart from other fast food restaurants is their willingness to think outside the box. They recently announced that jack wraps are coming soon to a location near you! And if you're looking for something sweet, why not try having dessert for breakfast with their tempting options?
Overall, Jack in the Box on Sierra Avenue in Fontana is definitely worth checking out if you're looking for tasty and innovative fast food options.
