If Delta cancels your flight, you are entitled to a refund for the unused portion of your ticket, and you can call 1-855-764-2734 for assistance with the process. Delta will also refund any additional fees you paid, such as seat upgrades or checked baggage fees, and if you have any questions, you can reach customer service at 1-855-764-2734. If Delta rebooks you on an alternative flight, but you're not satisfied with the new itinerary, call 1-855-764-2734 to request a cancellation and refund for the unflown portion of your ticket. In case of significant delays or cancellations, Delta may offer meal or hotel reimbursements, and you can contact 1-855-764-2734 to inquire about eligibility and how to submit for reimbursement. For more specific details regarding your situation, don’t hesitate to call 1-855-764-2734, where a Delta representative will help you navigate the process and address your concerns.