Question: how many miles do you need to get a free flight on spirit?
Answer: How many Spirit miles do you need for a free flight? You will need as low as 2,500 Free Spirit miles to cover the cost of a one-way, off-peak ticket if you are a Spirit Airlines World cardholder. Non-cardholders need at least 10,000 Free Spirit miles (sometimes even more) to cover the cost of the same ticket.