To use United Airlines travel credits, start by logging into your United account or going to the United Airlines website. When booking a flight, you can apply your travel credits during the payment process by selecting the "Travel Credit" option. Enter the credit details, such as the certificate or electronic travel credit number, and the amount will be applied to your booking. United credits can typically be used for flight purchases or associated fees, but they may have expiration dates or specific terms, so it's important to check the details before use.
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