Is religion superstition? No.
You can find religious people with superstitions and elements of their religion can be part of a superstition.
But you also can find scientists with superstitions and elements of their science can be part of their superstition.
Frankly, I think science is more akin to superstition than religion. Superstition generally comes from extending some coincidental pattern of events into a general rule. The most you can say is that in science we expect and look for a causal connections. Superstitions can also come from fanciful stories and pranks. They play upon a natural human tendency to look for patterns and seek ways of controlling the events of our lives. Superstition can be likened to primitive science, but equating religion to this simply reveals a very poor understanding of religion.
So when is it science and when is it superstition? It is science when we continue to test the idea and look for explanations for why it is happening. It is superstition when we ignore evidence to the contrary and cling to them without explanation. Is religion like that with some people? Yep. …even when they call their religion by the name of science. LOL But religion is not like this for all who are religious… having nothing to do with any attempt to control the events of their lives.
But what about the way people pray for things? Isn’t that an example of an effort to control things in their life? Not necessarily. More often is about making a stand about the things we care about and communicating them to God. This certainly can cross over into superstition. I think a great example is found in the way people conducted business in the ancient world, where people made offerings at the temple as a part of their business… like an offering to Poseidon to protect a ship from mishaps at sea.