How to File a Complaint With Frontier Airlines | 2025–2026 Step-by-Step Guide

Frontier Airlines is a U.S.-based ultra-low-cost carrier known for its affordable fares and extensive domestic network. While its low-cost model attracts many travelers, flight delays, lost baggage, and denied refunds can occur.

Filing a formal complaint ensures your concern is officially recorded, increases the likelihood of receiving compensation or a refund, and helps improve customer service. This 2025–2026 guide explains how to file a complaint with Frontier Airlines, contact customer service, request refunds, and escalate unresolved issues.

Quick Contact Options for Frontier Airlines

Before submitting a formal complaint, many issues can be resolved quickly by contacting Frontier’s customer service directly.

Customer Service Phone (U.S.): 1-801-401-9000

Hours: Monday–Friday, 8 a.m.–10 p.m. ET; Weekends, 9 a.m.–6 p.m. ET

Live Chat: Available on flyfrontier.com/contact
or through the Frontier mobile app.

Social Media:

X (Twitter): @FlyFrontier

Facebook: facebook.com/FrontierAirlines

Minor issues such as flight changes, seating corrections, or general questions are often resolved quickly through these channels. For refunds, lost baggage, or escalations, official complaint submission is recommended.

How to File a Complaint Online

Frontier Airlines offers an online complaint form for submitting formal issues, feedback, and refund requests.

Steps to Submit a Complaint:

Go to flyfrontier.com/contact
and select “Customer Feedback/Complaint Form.”

Choose the type of complaint: Flight Experience, Baggage, Refund, or Customer Service.

Enter your confirmation number, flight date, and contact information.

Provide a detailed description of the issue, including flight numbers, staff names, or relevant details.

Attach supporting documents such as boarding passes, receipts, or photos.

Submit the form and retain the case reference number for follow-up.

Frontier Airlines generally responds within 7–10 business days, although more complex issues like international refunds may require additional time.

Filing a Complaint by Phone or Mail

If you prefer speaking to a representative, Frontier Airlines accepts complaints via phone or postal mail.

Customer Relations Phone: 1-801-401-9000

Mailing Address:
Frontier Airlines Customer Relations
P.O. Box 660406
Dallas, TX 75266

Include the following in written complaints:

Full name and contact information

Flight number, date, and confirmation code

Detailed explanation of the issue

Copies of receipts, boarding passes, or previous correspondence

Mailed complaints typically take 2–4 weeks to process and are useful when submitting physical documentation.

Refunds, Compensation, and Travel Credit

Refunds and compensation are common reasons for complaints with Frontier Airlines.

Refundable fares: Eligible for full refund to the original payment method.

Nonrefundable fares: Issued as travel credit for future flights.

Canceled flights by airline: Eligible for a full refund or rebooking without fees.

Refund Submission Process:

Visit flyfrontier.com/refunds
.

Fill out the Refund Request Form with your ticket number and passenger details.

Attach supporting documentation if applicable.

Refunds are generally processed within 7–14 business days, depending on payment method and documentation.

For flight delays, missed connections, or other service-related issues, Frontier Airlines may offer travel credits or loyalty points. Submitting a formal complaint ensures these requests are considered.

Baggage Complaints

Lost, delayed, or damaged baggage is a frequent complaint. Frontier Airlines provides a clear process for handling these issues.

Report baggage issues immediately at the airport or call 1-801-401-9000.

Time limit: Must report lost baggage within 24 hours for domestic flights and 7 days for international flights.

Compensation: Frontier reimburses reasonable expenses incurred while baggage is delayed; keep receipts.

Check claim status: Visit flyfrontier.com/baggage
to track your claim.

Escalating Unresolved Complaints

If your complaint remains unresolved, consider these escalation steps:

Follow up using your case number: Reply to emails or call Customer Relations.

Request a supervisor: Ask for a higher-level representative to review your complaint.

Department of Transportation (DOT): File a complaint with the DOT for unresolved issues involving refunds, denied compensation, or mishandled baggage:
airconsumer.dot.gov/escomplaint/ConsumerForm.cfm

DOT complaints usually require Frontier Airlines to respond within 30 days.

Contacting Frontier Airlines Corporate Office

For serious or unresolved complaints, contacting Frontier’s corporate office may help escalate your case.

Corporate Office Address:
Frontier Airlines, Inc.
4702 S. 20th Street
Denver, CO 80237

Corporate Phone: 303-696-4000

Include your case number, flight details, and a concise explanation of the issue. Professional correspondence increases the likelihood of resolution.

Tips for Submitting an Effective Complaint

Be factual and concise: Clearly describe the problem and your desired resolution.

Include documentation: Boarding passes, receipts, and photos strengthen your claim.

Use official channels first: Online forms and phone calls are prioritized over social media.

Follow up consistently: Contact Customer Relations every 7–10 days if no response is received.

Reference your case number: Ensures continuity in communication.

Typical Response Times
Complaint Type Response Time
Online form 7–10 business days
Refund requests 7–14 business days
Baggage issues 7–21 business days
Mailed complaints 2–4 weeks
DOT escalation Up to 30 days

Providing accurate contact information and all required documentation helps expedite responses.

Conclusion

Filing a complaint with Frontier Airlines in 2025–2026 is straightforward if you follow the proper channels. The online feedback form is the fastest method, while phone and mail options are available for complex issues.

By documenting details, using official channels, and escalating unresolved complaints through Customer Relations or the DOT, you increase your chances of receiving refunds, travel credits, or compensation.

Even as an ultra-low-cost airline, Frontier Airlines provides avenues to ensure travelers’ concerns are addressed professionally and efficiently.