While Carnival Cruise 24 hour customer service?  offer 24/7 support
While Carnival Cruise 24 hour customer service?  offer 24/7 support
While general customer service for booking or current reservation questions is not 24/7,
Carnival does offer 24/7 support in specific emergency situations.
Here's a breakdown:
1. General Customer Service:

Booking and Reservation Questions: Available Monday-Friday 9:00 a.m. to 10:00 p.m. ET, and Saturday-Sunday 9:00 a.m. to 6:00 p.m. ET.
Customer Service Team: Contact them at (855) 732-4023 during the hours listed above for questions about your current reservation. You can also reach them for booking inquiries at the same number.
Online Support Team: Available for website or technical support during the same hours at (855) 732-4023.

2. 24/7 Emergency Support:

Travel Hotline for Fly2Fun Guests: If you've booked Carnival's Fly2Fun program and have a travel emergency or delay en route to or from the ship, you can call their Travel Hotline, which is available 24/7. The number for the U.S., Canada, Bahamas, Bermuda, Cayman Islands, and Mexico is 1-855-732-4023.
Shore-to-Ship Emergency Contact: In a true emergency involving a family member not traveling with you, family members can contact Carnival's call center at 1-855-732-4023. They are available Mon - Sun, 7:00 am - 10 pm EST, and will take the caller's information to pass on to the onboard Guest Services team. An alternate source says that for emergency calls about someone on a ship, you can contact Carnival's call center at 1-855-732-4023 on a 24/7 basis.

In summary, while general customer service has specific hours, you can reach Carnival 24/7 in certain emergency situations related to Fly2Fun program delays or contacting a passenger onboard in a true emergency.

Carnival Cruise Line has several contact options for customer service, with varying hours of operation
.
For general inquiries or to book a cruise:

Phone: 1-855-732-4023.
Hours: Monday – Friday, 9:00 a.m. to 10:00 p.m. ET; Saturday – Sunday, 9:00 a.m. to 6:00 p.m. ET.

For questions about existing reservations:

Phone: 1-855-732-4023.
Hours: Monday – Friday, 9:00 a.m. to 10:00 p.m. ET; Saturday – Sunday, 9:00 a.m. to 6:00 p.m. ET.

For technical website support:

Phone: 1-855-732-4023.
Hours: Monday – Friday, 9:00 a.m. to 10:00 p.m. ET; Saturday – Sunday, 9:00 a.m. to 6:00 p.m. ET.

For Fly2Fun guests experiencing travel delays:

24/7 Travel Hotline: 1-855-732-4023 (US/Canada/etc.) or 1-855-732-4023 (outside the US).

For true emergencies regarding guests on a ship:

Emergency Contact Number: 1-855-732-4023.
Hours: Monday - Sunday, 7:00 am - 10:00 pm EST.
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