06/02/2026
taco tuesday you know the drill 🌮 get 2 tacos for $.75, no purchase requirement, in-app only for one day only.
Jack in the Box
- Home
- Fontana
- Sierra Avenue
- Jack in the Box
Jack in the Box is a popular fast food and burger restaurant located on Sierra Avenue. Their menu features a variety of options including burgers, tacos, and egg rolls that cater to all cravings. The restaurant is known for their unique promotions such as the Pineapple Express Shake and Mega Munchies Box, available for a limited time through their app or website. With their creative social media presence and delicious food, Jack in the Box is a must-try for anyone looking for tasty fast food options.
Recent social media posts
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.
Telephone
Website
Alerts
Be the first to know and let us send you an email when Jack in the Box posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.
Share
Category
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.