I assume you are asking how much they might cost. It is really hard to say. My experience is SW fares are initially high (but competitive) and come down over time, but you need to check daily. Since I fly Southwest a few times a year, I don't mind booking at a higher fare and then re-book when the fare comes down. Southwest does not charge a change fee and lets you keep a credit for a future flight. Credit must be used within 1 year of initial ticket purchase.