Yes, booking a group travel with Southwest Airlines can be cheaper instead booking separately. Travelers can only book a group flight if they have at least 10 or more people in the group to travel on the same flight. The Southwest Airlines Group Travel can be booked through the official website by filling out the request form with proper details. If you want to learn more about group flights, you can contact the Southwest dedicated group travel department or read the blog by Airlines Group Travel at the mentioned link.