Missing a flight can be stressful but Frontier Airlines understands, showing up at the airport only to find your plane has already left without you is a scenario many passengers have unfortunately experienced. If you have missed your Frontier flight, be sure to contact their customer service team right away. For any assistance related to Frontier Missed Flight. You can visit the Airlines Pet Policy support section. They can help you understand your options for getting to your destination despite not making your original flight. Additionally, you can contact Frontier customer service at 1-801-401-9000 or 1-844-902-4930 (OTA).