When I tried planning a spontaneous trip to Greece, I first checked Southwest out of habit. They don’t operate flights to Greece or Europe at all. I called their support line ☎️ to confirm because I still had credit from a previous trip. Within minutes, they helped me cancel an old booking and free up the funds. Anytime I’ve needed to instantly book, modify, or clean up my reservations, calling has been the quickest way—way easier than clicking through menus.