Updated August 24, 2026
O Fallon drivers know cracked windshields don't wait for a convenient moment. Whether it's a rock chip from Illinois highway debris, a stress crack from a cold morning, or a full break-in side window, the 2 verified shops listed below cover the full range — windshield replacement, fast chip repair, mobile installation at your driveway, ADAS calibration, and direct insurance billing.
Typical O Fallon-area pricing, estimated from national installer data and adjusted for Illinois labor and parts rates. Your exact quote depends on the vehicle, glass features, and whether ADAS recalibration is required.
| Service | Low | Typical | High |
|---|---|---|---|
| Windshield Replacement | $250 | $385 | $520 |
| Windshield Replacement + ADAS Calibration | $520 | $705 | $1,135 |
| Rock Chip Repair | $65 | $105 | $160 |
| Side Window Replacement | $185 | $265 | $465 |
| Rear Window Replacement | $205 | $345 | $670 |
“Happy with the result. Ze Auto Glass replaced my windshield and it looks great. Took an extra day to get the right glass in but that's not really their fault.”
Omar W. · Ze Auto Glass
“Great experience start to finish. The receptionist at Glass On Time was helpful on the phone, the quote held up, and the tech was on time. That's all you can ask for.”
Holly J. · Glass On Time
“Quick chip repair done in 30 minutes. The tech at Glass On Time was super knowledgeable and walked me through what they were doing. Crack stopped spreading immediately.”
Greg K. · Glass On Time
Full glass swap when cracks exceed repairable size. O Fallon shops carry OEM and OEM-equivalent options for most makes.
Resin injection in 20–30 minutes. Stops the crack, often free with comprehensive insurance for Illinois drivers.
Most O Fallon shops dispatch a tech to your home, office, or job site — no driving on a cracked windshield.
Required after windshield replacement on most 2018+ vehicles for lane departure, automatic braking, and adaptive cruise.
Direct billing, deductible verification, and paperwork handled by the shop. Many Illinois drivers pay zero out-of-pocket.
Door glass, quarter windows, rear windshields with defroster reconnection — same-day availability at most O Fallon shops.
In O Fallon, a standard windshield replacement typically runs $250–$520, with most drivers paying around $385. Vehicles from 2018 and newer that need ADAS camera recalibration usually land between $520 and $1,135. A rock chip repair is far cheaper — about $65–$160, and often free with comprehensive insurance.
Side window (door glass) replacement in the O Fallon area generally costs $185–$465, averaging around $265. Frameless or laminated door glass on newer vehicles sits at the top of that range. Most O Fallon shops vacuum out broken glass and can complete the job the same day.
Rear windshield replacement for O Fallon, Illinois drivers typically runs $205–$670, with an average around $345 — the defroster grid and any embedded antenna are what push the price up. Shops reconnect the defroster as part of the install.
Yes. Most O Fallon auto glass shops dispatch a mobile technician to your home, office, or job site at no extra charge, so you never have to drive on a cracked windshield. Same-day mobile appointments are common throughout the O Fallon area.
If you carry comprehensive coverage, windshield repair is usually covered and many Illinois policies waive the deductible for chip repairs. Full replacements are covered too, though your deductible may apply. O Fallon shops handle the paperwork and bill your carrier directly.
The replacement itself takes about an hour, plus a safe-drive-away time of roughly one hour for the adhesive to cure. If your vehicle needs ADAS calibration, add another 30–60 minutes. Most O Fallon shops have you back on the road the same day.
Compare the shops listed on this page by services offered, mobile availability, and insurance billing. Look for technicians who follow AGSC safety standards and use OEM or OEM-equivalent glass, and check recent customer reviews before you book your O Fallon appointment.