As soon as you realize your luggage is missing, report it to the airline's baggage service office or counter at the airport. They will provide you with a Property Irregularity Report (PIR) to document the details of your lost luggage.

Ensure that the airline has your current contact information, including your hotel or the place you'll be staying. This will allow them to reach you as soon as they locate your luggage.

Ask for a copy of the Property Irregularity Report (PIR). This document is crucial for any potential insurance claims or follow-up with the airline.

Inquire about the airline's compensation policies for lost luggage. Airlines often have specific guidelines for reimbursing passengers for the inconvenience and any immediate needs, such as toiletries or clothing.

If you have travel insurance, review the coverage related to lost or delayed luggage. This could provide additional reimbursement for essential items you may need to purchase.

Keep in touch with the airline's lost and found department. They may have updates on the search for your luggage. Provide any additional information they may request promptly.

If your luggage is not found within a reasonable time (which can vary by airline), file a formal claim with the airline. This often involves completing a claims form and providing supporting documentation.

If you incur expenses due to the loss of your luggage, such as purchasing clothing or toiletries, keep all receipts. These documents will be essential when seeking reimbursement from the airline or your travel insurance.

Persistence is key. Continue to follow up with the airline until your luggage is found or the situation is resolved. Stay calm and assertive in your communications.

Consider taking preventive measures for future trips, such as using luggage tags with your contact information, packing essentials in your carry-on, or choosing non-stop flights when possible.