I'm sorry to hear that you missed your Frontier flight. Missing a flight can be a stressful experience, but there are a few steps you can take to address the situation:

Contact Frontier Airlines: Reach out to  Frontier Missed Flight

•  Airlines as soon as possible to inform them of your situation. You can call their customer service or visit their website to find the contact information. Explain the circumstances, and they will guide you on the next steps.
• Rebooking: Ask if it's possible to rebook your flight. Be prepared for the possibility that you may need to pay a fee or the fare difference, especially if you missed your flight due to your own reasons.
• Check Travel Insurance: If you purchased travel insurance, review the policy to see if it covers missed flights and what steps you need to take to make a claim.
• Consider Alternate Flights: If Frontier Airlines cannot accommodate you on another flight that suits your schedule, consider looking for alternative flights on other airlines.
• Arrive Early for Future Flights: In the future, make sure to arrive at the airport with plenty of time to spare before your flight's departure. Airlines typically recommend arriving at least 2 hours before a domestic flight and 3 hours before an international flight.

Remember that policies and procedures may vary depending on the airline and your specific situation, so it's essential to communicate with Frontier Airlines to understand your options and seek a resolution.