Skip to content
Return to Nav
Get 1/2 Price Drinks and Slushes any time you Order Ahead using the SONIC app!

Sonic Drive-In 312 S. Main Street, O'fallon

8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
Get Directions
Address
312 S. Main Street O'fallon, MO 63366 US
(636) 272-1838(636) 272-1838
(Call this Drive-in)
(866) 657-6642(866) 657-6642
(Call for customer service inquiries)
Hours:
Day of the WeekHours
Mon
8:00 AM - 12:00 AM
Tue
8:00 AM - 12:00 AM
Wed
8:00 AM - 12:00 AM
Thu
8:00 AM - 12:00 AM
Fri
8:00 AM - 12:00 AM
Sat
8:00 AM - 12:00 AM
Sun
8:00 AM - 12:00 AM

NEW SUMMERTIME BLTS

Starting at just $3.99, the Summertime BLTs offer two fresh spins on a classic: The Summertime BLT and Summertime Chicken BLT.
LEARN MORE

Red Bull™ Slushes

Next level Red Bull™ boost... only at SONIC!
FIND YOUR FLAVOR

NEW MOCKTAIL SLUSHES

Giving you all the vacation vibes, the Mocktail Slushes come in three irresistible flavors – Strawberry Daiquiri, Piña Colada and Reaper Spicy Margarita.
FIND YOUR FLAVOR
Get the Sonic App!
Get rewards, find locations, pay with your phone, send gift cards to friends, and more!

About Sonic Drive-In 312 S. Main Street O'fallon

For more than 60 years, SONIC, America’s Drive-In has built the ultimate dining experience with our drive-in restaurants and we proudly serve our guests in O'fallon, MO. We did it by sticking to what made drive-ins so popular in the first place: made-to-order American classics, signature menu items, and speedy service from friendly Carhops full of fun and personality. Cruise on over to us at 312 S. Main Street for the ultimate SONIC experience!
www.sonicdrivein.com

Check Us Out on Instagram

Nearby Sonic Drive-In Locations

Nearby Locations

Sonic Drive-In 651 Salt Lick Road, Saint Peters

Today's Hours:
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
8:00 AM - 12:00 AM
651 Salt Lick Road Saint Peters, MO 63376 US
(636) 387-0332(636) 387-0332
2.38

Sonic Drive-In 6325 Ronald Reagan Drive, Lake Saint Louis

Today's Hours:
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
8:00 AM - 12:00 AM
6325 Ronald Reagan Drive Lake Saint Louis, MO 63367 US
(636) 561-4312(636) 561-4312
5.36

Sonic Drive-In 2001 Old Highway 94 South, Saint Charles

Today's Hours:
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
8:00 AM - 12:00 AM
2001 Old Highway 94 South Saint Charles, MO 63303 US
(636) 724-8000(636) 724-8000
9.58

Sonic Drive-In 3851 Elm Street, St. Charles

Today's Hours:
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
7:00 AM - 12:00 AM
8:00 AM - 12:00 AM
3851 Elm Street St. Charles, MO 63301 US
(636) 925-0044(636) 925-0044
9.83