JetBlue Airways doesn't have a specific physical customer service office in Helsinki, Finland instead, you should use their main contact methods: call the U.S. number (1-866-829-1086) or find international numbers on their Contact Us page for Europe, like their UK line (1-866-829-1086). For online bookings or general inquiries, their website and app are primary resources, as they focus on direct customer contact rather than local airport offices in many cities.