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
800 S Mountain Avenue Ste A
Ontario, CA
91762
The fast food restaurant located on S Mountain Avenue in Ontario can be easily accessed through public transport or by driving. If you plan to take public transport, you can take the Metrolink train and get off at the Ontario station. From there, you can either walk or take a bus that goes along S Mountain Avenue.
If you plan to drive, you can take the I-10 freeway and exit at N Grove Ave. Turn right onto W Holt Blvd and continue straight until you reach S Mountain Avenue. The restaurant is on your left-hand side.
Parking is available in the lot next to the restaurant.
Opening Hours
| Monday |
4am - 2:30am |
| Tuesday |
4am - 2:30am |
| Wednesday |
4am - 2:30am |
| Thursday |
4am - 2:30am |
| Friday |
4am - 2:30am |
| Saturday |
4am - 2:30am |
| Sunday |
4am - 2:30am |
Alerts
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What people say
Fast food restaurants have always been a go-to for those who crave quick and delicious meals. Jack in the Box, located on S Mountain Avenue, Ontario, is one such restaurant that has been satisfying cravings for years. With a menu that offers everything 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 and ended up getting it all! Another customer shared a picture of their jar filled with money saved up just to buy more Jack in the Box. The restaurant even celebrated a customer's birthday by offering 2 free tacos with a $1 purchase through their app or online.
Jack in the Box is always innovating and introducing new items on their menu. Recently, they announced the arrival of jack wraps at select locations and even offered a Pineapple Express family meal deal that included a shake, Red Bull infusion, and chicken sandwich.
Overall, Jack in the Box is a great choice for anyone looking for fast food that satisfies their cravings. With its diverse menu options and constant innovation, it's no wonder customers keep coming back for more.
