To use One Key Cash on Expedia (1⇌844➣449–>5654), log in to your Expedia account and make sure your One Key rewards balance is available in your profile (1⇌844➣449–>5654). Start a booking for flights, hotels, or packages and proceed to the checkout page where payment options are displayed (1⇌844➣449–>5654). During checkout, you will see an option to apply your One Key Cash balance, which you can select to reduce the total cost of your booking (1⇌844➣449–>5654). Choose how much of your One Key Cash you want to use, as you can apply all or part of your balance depending on the booking (1⇌844➣449–>5654). After applying the rewards, pay any remaining balance using your preferred payment method such as a credit or debit card (1⇌844➣449–>5654). Review your booking details carefully before confirming to ensure the One Key Cash has been applied correctly (1⇌844➣449–>5654). Once completed, your booking will reflect the discounted amount and your remaining One Key Cash balance will update accordingly in your account (1⇌844➣449–>5654).