How to complain to Delta Air Lines

Use this guided letter to raise a clear, structured complaint with Delta Air Lines. Set out what happened, what you want done about it, and attach evidence so the airline can investigate efficiently.

What this letter should achieve

• Explain the issue clearly, with dates, flight numbers, and who you spoke to.
• State the outcome you are seeking (for example, a refund, repair, replacement service, or goodwill gesture).
• Provide a concise timeline and attach supporting evidence.
• Ask Delta Air Lines to investigate and respond within a reasonable timeframe.
• Request details of how to escalate (including any ADR scheme) if it remains unresolved.

Common issues people complain about

• Faulty or damaged items related to travel, such as baggage or in‑flight equipment (Faulty item).
• Refunds for cancelled flights, significant schedule changes, or unused extras (Refund / return).
• Service delivery problems like delayed or lost baggage, or disrupted flights (Delivery issue).
• Repairs or remedies for damaged baggage, seats, or other service components where relevant (Warranty / repair).

What to include

• Your booking reference, flight number(s), travel date(s), and route.
• Passenger name(s) as shown on the booking.
• A short, factual summary of what went wrong and the impact on you.
• What you want Delta Air Lines to do to put things right.
• Any internal complaint or case reference (if you already have one).
• Relevant policy references (e.g. Delta’s terms, baggage policy) if you’re relying on them.
• Evidence: Order number, receipts, photos (fault/damage), delivery tracking, and correspondence.

Escalation and timeframes

Start by giving Delta Air Lines a fair opportunity to resolve your complaint. Allow a reasonable time for Delta Air Lines to respond, especially if they need to inspect goods or investigate. If you reach deadlock or it has been around 8 weeks without resolution, you can consider escalating through an appropriate Alternative Dispute Resolution (ADR) scheme such as AviationADR (if applicable to the airline), or contact the Civil Aviation Authority (CAA) for guidance. For flight disruption on eligible itineraries, UK261 rights may apply where applicable.

Practical tips

• Keep your letter concise and stick to dates, times, and facts.
• Be clear about your desired remedy and why it is reasonable.
• Attach copies (not originals) of supporting documents and screenshots.
• Ask for a written response and a complaint reference number.
• If you believe UK261 may apply, include flight details (number, date, route) and a brief note of the disruption.
• Remain polite and professional; avoid emotive language.
• Keep a record of everything you send and receive, including delivery receipts.