Expedia program offers you access to the #1 online travel agency, great deals on air, hotel, vacation packages, cruise, car rentals, and in-destination services access for Expedia. com and Expedia. 7-day action referral period. Bookings and completed stays are batched in daily for the previous day's transactions. Expedia. Proof of completed travel will need to be provided by the customer in order to credit any car transactions exceeding $5,000.