Car seats in rental cars

Unfortunately, we do not know for sure which companies have car seats for children but from our experience, all the companies tend to use the cheapest seats they can get.  They are usually not very good seats and some of them don't even use the Latch system so have to be restrained using the seat belts. If that is a concern, you may want to look into bringing your own. It is a bit of a pain in the airport, but all airlines will allow you to check car seats without a charge.