Spirit Airlines does not currently operate a direct office in Singapore. However, customers in Spirit Airlines Singapore Office services through their official website or by contacting their customer service center. The airline primarily offers budget-friendly flights within the United States, the Caribbean, and Latin America. For any inquiries or support regarding bookings, cancellations, or flight details, travelers can reach out to Spirit Airlines through their online support channels or phone lines. It’s always a good idea to check the airline's official site for the most accurate and up-to-date contact information.