The main phone number for Expedia car rental customer service is not listed separately, but you can reach general customer service via the main Expedia customer service line. For US customers, you can call the general customer service line or use online chat; for international numbers, Expedia provides a UK customer service number: (1) (805) (330) 4056 from within the UK and +(1) (888) (829) (0881) from abroad. The general customer service line can be reached via online chat or phone, 24 hours a day, 365 days a year, as detailed on Expedia's contact page.UK customers: Call the Expedia customer service number at (1) \(888) \(829) \(0881).International callers to the UK: Call (1) (888) (829) (0881).