To cancel your Southwest Airlines booking within 24 hours of purchase without incurring any cancellation fees, follow these steps Log in to your Southwest Airlines account on the website or mobile app Find the booking you wish to cancel and select the option to cancel Follow the prompts to confirm the cancellation Alternatively you can call 1-844-296-4458 Southwest Airlines customer service within 24 hours of booking to cancel and receive a refund Ensure to check the specific terms and conditions of your booking for any applicable restrictions or fees.