Fast Food Restaurant – illustrative photo

Fast Food RestaurantFenton, MO

Sonic – Fenton, MO

Closed · opens 7:00 AM

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Illustrative photo

Opening hours

Closed · opens 7:00 AM

Weekly opening hours of Sonic
Monday	7:00 AM – 11:00 PM
Tuesday	7:00 AM – 11:00 PM
Wednesday	7:00 AM – 11:00 PM
Thursday	7:00 AM – 11:00 PM
Friday	7:00 AM – 12:00 AM
Saturday	7:00 AM – 12:00 AM
Sunday	8:00 AM – 10:00 PM

Local time in Fenton: 4:49 AM (CDT). Holiday hours may differ – call (636) 343-1669 to confirm.

Location & directions

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100 Gravois Bluffs Circle
Fenton, MO 63026

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About Sonic

Located at 100 Gravois Bluffs Circle in Fenton, Missouri, Sonic is a fast food restaurant. Our Fenton guide covers 45 food and drink spots, and this is one of them.

Sonic is open 7 days a week, usually 7:00 AM – 11:00 PM. It stays open late, until 11:00 PM on most nights. Early risers are covered too: doors open at 7:00 AM most days.

Available service options are takeout. On the menu: burgers.

Phone: (636) 343-1669.

Quick facts

Category: Fast Food Restaurant · Burger
Address: 100 Gravois Bluffs Circle, Fenton, MO 63026
Phone: (636) 343-1669
Hours: Open 7 days a week, usually 7:00 AM – 11:00 PM
Listing updated: September 2026 · Suggest an edit

Popular times (estimated)

6AM

9AM

12PM

3PM

6PM

9PM

Estimated from typical visit patterns for fast food restaurants and this venue’s opening hours – not live data.

Features & amenities

Service options

Takeout

Reviews

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Frequently asked questions

What are Sonic's opening hours?

Open 7 days a week, usually 7:00 AM – 11:00 PM. Monday: 7:00 AM – 11:00 PM; Tuesday: 7:00 AM – 11:00 PM; Wednesday: 7:00 AM – 11:00 PM; Thursday: 7:00 AM – 11:00 PM; Friday: 7:00 AM – 12:00 AM; Saturday: 7:00 AM – 12:00 AM; Sunday: 8:00 AM – 10:00 PM.

Is Sonic open on Sunday?

Yes, Sonic is open on Sundays: 8:00 AM – 10:00 PM.

Where is Sonic located?

Sonic is located at 100 Gravois Bluffs Circle, Fenton, MO 63026.

What is the phone number of Sonic?

You can call Sonic at (636) 343-1669.

Does Sonic offer delivery or takeout?

Delivery is not listed for Sonic, and takeout is available. Listed service options: takeout.