Will insurace pay for a Rhinoplasty if its causeong Sleep Apnea?

Probably. You might have to make a special agreement, but I'd think yes. See what the doctor's secretary/office says about this.

But please get this done. My dad has this problem due to a traumatic accident. He broke his nose and never bothered to fix it. Now he is constantly congested and making sniffy noises. It's quite obnoxious.

My ex-boyfriend also had several previous nasal fractures that went without fix. At night, I'd often hear weird whistling sounds coming from his nose. Again, seriously obnoxious.