The Frontier Airlines Pittsburgh Office If you're in need of assistance planning your flight and customer service questions, the Frontier Airlines Pittsburgh Office is there to help. From getting an answer to questions about reservations, ticket changes, baggage, check-in, choosing seats, cancellations, refunds, and general flight scheduling information, the Frontier Airlines customer service department is ready to get you the answers you need. Whether it's a business trip, family trip, or vacation, reliable assistance can help make your Frontier Airlines booking much less stressful.