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Jack in the Box has always been the place for those who live outside the box. Where you can try new things and order what you want when you want it, while always getting it fast, hot and fresh. If you love the classics, burgers make up the core of our menu with the signature Jumbo Jack®, Ultimate Cheeseburger, the Buttery Jack™ and the Sourdough Jack® on our trademark toasted sourdough. If you seek good value, we offer Jack’s Deals with our famous two tacos, chicken nuggets, Jr. Bacon Cheeseburger and more. We don’t dictate cravings. We serve our full menu, including breakfast, all day every day. Want a burger for breakfast or breakfast sandwich for dinner? You got it.
Burgers, chicken, tacos & breakfast items fill out the menu at this fast-food chain.
Hours
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | 12–1:30 AM, 4 AM–1:30 AM |
| Wednesday | 4 AM–1:30 AM |
| Thursday | 4 AM–12 AM |
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8134 Sierra Ave – Order from Jack In The Box in Fontana, California
OPEN TODAY UNTIL 04:00 AM. 8134 Sierra Ave Fontana, CA 92335. (909) 427-0109 · Get Directions · Order Now · Download APP Download APP.
All Jack In The Box locations in Fontana, CA
Jack In The Box in fontana, ca ; 8134 Sierra Ave · (909) 427-0109 ; 10110 Sierra Ave · (909) 822-1189 ; 17020 S Highland Ave · (909) 574-4816 ; 13449 Baseline Ave · ( …
Jack in the Box, 10110 Sierra Ave, Fontana, CA 92335, US
Jack in the box is stingy with their ranch. They won’t even let you purchase any. They only let you have one, maybe two depending on what you order. I gave this …
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Reviews
Verónica Flores De León
For the last 2 and a half years my daughter, brother,and I have enjoyed Jack in the box weekly every Saturday at around 5:30amish. Ordering for the most part the same meals. We have always had great service. Great customer service. Angel has been the best so far, funny and friendly!!
BUT today we were encountered by the most rudest team member or associate i have ever encountered. First of all, we were not greeted. Her demeanor was like she was forced to be there. Second, when we received our food and were driving off my daughter noticed her order was not correct. We backed up and informed Jackie that the order was wrong. She said that’s what you ordered (very rudely). And we said no we didn’t but we will need to correct this meal. I handed her the bag and she said it will be $2 more,( very rudely again). My brother had already put his card away in his wallet and pocket. He was sitting in the back seat. Then she said I will need that card. (Very rude). We gave her the card. Then she asked for us to park in front. On our way there, we were in shock that we were treated this way today unlike all other days. She walked out and gave me the bag and said NEXT TIME CHECK THE SCREEN! I asked her for her name as she was opening the door to the restaurant, she said Jackie.
I was so disappointed with her attitude and behavior. Her pure lack of social skills was so apparent.
My children, my brothers and I have all worked fast food. Our customer service skills were always on point. Maybe because our parents taught us to respect. I would not accept this behavior of my children at their work place.
I honestly advise that Jackie be trained in appropriate customer service. This is a skill that most young adults and teens are lacking. They will need these skills in order to acquire a professional career. My first manager at Burger King, Ron Koester, taught me exceptional customer service skills. These skills helped me on my professional careerof 30 plus years.
I had the ability to interview and interact with people at a compassionate and professional level. I gave the same respect to the directors as I did to the worse perpetrators. Can you imagine how hard that can be? With that being said, my training also included deescalating the situation, by responding not reacting and ultimately having a win-win outcome.
Please take into consideration my suggestion, your workers will thank you for it in the future. Maybe not while they are in training.
Thank you for your time and attention.
I called and spoke with Brittany regarding the situation. I asked to speak with upper management or owner, she informed manger would be in on Monday.
I would appreciate a time and date to have an in person meeting with the owner or manager of this Jack in the box franchise.
… moreBUT today we were encountered by the most rudest team member or associate i have ever encountered. First of all, we were not greeted. Her demeanor was like she was forced to be there. Second, when we received our food and were driving off my daughter noticed her order was not correct. We backed up and informed Jackie that the order was wrong. She said that’s what you ordered (very rudely). And we said no we didn’t but we will need to correct this meal. I handed her the bag and she said it will be $2 more,( very rudely again). My brother had already put his card away in his wallet and pocket. He was sitting in the back seat. Then she said I will need that card. (Very rude). We gave her the card. Then she asked for us to park in front. On our way there, we were in shock that we were treated this way today unlike all other days. She walked out and gave me the bag and said NEXT TIME CHECK THE SCREEN! I asked her for her name as she was opening the door to the restaurant, she said Jackie.
I was so disappointed with her attitude and behavior. Her pure lack of social skills was so apparent.
My children, my brothers and I have all worked fast food. Our customer service skills were always on point. Maybe because our parents taught us to respect. I would not accept this behavior of my children at their work place.
I honestly advise that Jackie be trained in appropriate customer service. This is a skill that most young adults and teens are lacking. They will need these skills in order to acquire a professional career. My first manager at Burger King, Ron Koester, taught me exceptional customer service skills. These skills helped me on my professional careerof 30 plus years.
I had the ability to interview and interact with people at a compassionate and professional level. I gave the same respect to the directors as I did to the worse perpetrators. Can you imagine how hard that can be? With that being said, my training also included deescalating the situation, by responding not reacting and ultimately having a win-win outcome.
Please take into consideration my suggestion, your workers will thank you for it in the future. Maybe not while they are in training.
Thank you for your time and attention.
I called and spoke with Brittany regarding the situation. I asked to speak with upper management or owner, she informed manger would be in on Monday.
I would appreciate a time and date to have an in person meeting with the owner or manager of this Jack in the box franchise.
Jacob Sullivan
Manager very rude. Just asked for my drink and said I could have it with my meal and she’ll do it herself. Rolled her eyes at me. What a way to start my Thanksgiving. Asked multiple times and refused me my cup. What’s the point of having a dine in soda fountain if I can’t fill my own cup. Also store was not stocked at all. No napkins, fountain area a mess. I kinda wish I could get a refund just for the poor experience. She should definitely not be allowed to be in charge. Cause she’s not even communicating with team effectively for orders and customer service.
… moreMiriam Smith
The food was spot on but this place still gets 3 stars because they hired a new white girl and her whole attitude was gross and made me not even want to be here. We waited at the drive thru to be greeted by a real person the first response to our hello is anybody there was “I’m waiting on you” and all of her words were curt and snappy like she didn’t get enough sleep and was taking it out on the customers.
… moreAlayah Walton
Complaint Regarding Poor Customer Service and Incorrect Replacement Order
Dear Jack in the Box Customer Service,
I’m writing to formally report a disappointing and frustrating experience I had at your 2910 Sierra Ave Fontana ca 92336 location on the morning of 10/8/25.
This visit was meant to be a simple pickup for a replacement order that had already been approved and documented by a manager due to a previous incorrect order. When I arrived at the drive-thru and placed the replacement order, I clearly stated that I was there for a replacement.
However, upon arriving at the window, I was met by an employee named Brittany, who was extremely rude and unprofessional. Instead of assisting me respectfully, she was argumentative and dismissive, insisting I needed a receipt even though I had spoken to a manager the day before who said everything was taken care of.
Despite my explanation, Brittany gave me a hard time and refused to honor the full replacement. To make matters worse, the replacement meal I was eventually given was also incorrect — again. Given Brittany’s attitude, I can’t help but feel this was intentional.
This entire experience was unnecessarily stressful and disappointing. I expect better service, especially when the mistake originated from your end in the first place.
I would appreciate if this issue could be addressed appropriately, both in terms of correcting the order and ensuring your staff — particularly Brittany — receives proper customer service training. I am happy to provide further details if needed.
Thank you for your attention to this matter.
… moreDear Jack in the Box Customer Service,
I’m writing to formally report a disappointing and frustrating experience I had at your 2910 Sierra Ave Fontana ca 92336 location on the morning of 10/8/25.
This visit was meant to be a simple pickup for a replacement order that had already been approved and documented by a manager due to a previous incorrect order. When I arrived at the drive-thru and placed the replacement order, I clearly stated that I was there for a replacement.
However, upon arriving at the window, I was met by an employee named Brittany, who was extremely rude and unprofessional. Instead of assisting me respectfully, she was argumentative and dismissive, insisting I needed a receipt even though I had spoken to a manager the day before who said everything was taken care of.
Despite my explanation, Brittany gave me a hard time and refused to honor the full replacement. To make matters worse, the replacement meal I was eventually given was also incorrect — again. Given Brittany’s attitude, I can’t help but feel this was intentional.
This entire experience was unnecessarily stressful and disappointing. I expect better service, especially when the mistake originated from your end in the first place.
I would appreciate if this issue could be addressed appropriately, both in terms of correcting the order and ensuring your staff — particularly Brittany — receives proper customer service training. I am happy to provide further details if needed.
Thank you for your attention to this matter.
Remarkable Review
Stopped here after a long car ride. The line wasn’t long but it took forever to get our food. We typically love Jack but this one was a disappointment. Patty was burned on one burger, and the other burger was cold with the cheese looking old. We didn’t eat it. We just stopped elsewhere. The window of the drive through was filthy, the woman handing our food and money was definitely not the friendliest which contributed to our experience. Wouldn’t return.
… moreVictoria Clark
Thank you very much for letting us buy something to eat sandwiches are good!!
We experienced some fast food restaurants that are not allowed to walk in the drive thru even though we let them know that it’s impossible to drive a 18 wheelers truck and they are still not let us get some food it’s SAD and RIDICULOUS
… moreWe experienced some fast food restaurants that are not allowed to walk in the drive thru even though we let them know that it’s impossible to drive a 18 wheelers truck and they are still not let us get some food it’s SAD and RIDICULOUS
Genesis Garcia
Angel held it down during a busy rush! Only him and the cook, but he managed everything smoothly. Works great under pressure!
… moreStephanie McLeod
The drive through employee was super nice.
Helpful and just very cool. I love this Jack in the box.
… moreHelpful and just very cool. I love this Jack in the box.
Nicole Cruz
Very rude lady my son went in and got my order and on the app I put 6 ranches and she told my son he can only receive two so she literally made my son pay for the other ranch SMH
People like that shouldn’t work in food if there so miserable and hate life
… morePeople like that shouldn’t work in food if there so miserable and hate life
Jerry De Vore
Good place to stop before you head up the pass for a quick snack or a delicious shake
… more