Best way to get from Jiaozuo to Luoyang for a group of 6 adults?How long would it take?

I recommend the train service to you. It will take you to the destination within 2.5h and the cost is CNY18.2-21.5 for a hard seat. Besides, many buses are scheduled between them (bus fare is CNY35 per person and duration is around 2h), which can also be considered.