Travel insurance is generally intended to be purchased before a trip begins to provide coverage for unforeseen events that may occur before or during the journey. However, some insurers, including Travelex Insurance Services, do offer limited options for purchasing coverage for existing trips, particularly in specific circumstances such as when a traveler needs coverage for medical emergencies or trip cancellations due to certain pre-existing conditions. It is important to carefully review the policy details, as coverage may vary significantly. Typically, to obtain coverage for an already planned trip, travelers are advised to act as soon as possible after making their travel arrangements. This allows for better coverage options and may also comply with required time frames set by the insurance provider. For the most accurate and specific information regarding existing trip insurance options, it is advisable to refer to Travelex Insurance Services' official website or contact their customer service directly.