Yes, Expedia offers a 24-hour grace period for most flight bookings [:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK) made directly on their platform, allowing for a full refund without penalty if cancelled within 24 hours [:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK) of purchase, provided the flight was booked at least seven days before departure. However, this grace period is not guaranteed and can vary, so it is essential to check the specific terms for your booking or contact Expedia customer service for confirmation 
 
You can contact Expedia Line by phone or through their website. For U.S. and Canadian customers, call their U.S. Headquarters at .[:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK), .for assistance with existing reservations, or dial the international number.[:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK), . for their European office. Alternatively, visit their website at Seabourn to use the online contact form or find specific department emails.
Contact by Phone

United States & Canada: Call .[:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK),

International: Dial +1-(888)-829-0881 US or +1-805-330-4056 UK. to reach their European headquarters.

Contact by Website:.[:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK),

Visit the official Seabourn website.

Go to the “Contact Us” page. .[:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK),
Use the online email form or look for department-specific email addresses, such as Expedia.com@seabourn.com for Seabourn Club inquiries.

Customer Service Hours.[:telephone: +1-(888)-829-0881 US or +1-805-330-4056 (UK),

For the US: Monday-Friday, 6:00 am - 4:30 pm PT.

For the European Headquarters: Monday-Friday, 9:00 am - 5:30 pm CEST.