To use United Airlines travel credits, simply apply the credit during the booking process on United's website or app. When purchasing a new flight, you’ll be prompted to enter your travel credit information, typically by providing the travel certificate number or credit details. The value of the travel credit will be applied toward the total cost of the new booking. Travel credits are usually valid for 12-24 months from the date of issuance and can only be used for flights, not other services like baggage or seat upgrades. Be sure to check the terms and expiration date of your credit before using it.
read more..