The time of the service may very depending on what the service is about, what church you attend, and what type of church. The church I attend has two Sunday morning services, both are the same sermon. The first service starts at 9:00AM and usually ends around 10:15AM. The second service starts at 10:30AM and usually ends around 12:15PM. There are times where the services will run over on time.
To know about a certain church in your area you could search and see if they have a website, look and see if they have an add tell you their time listed in the phone book or call the church.