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You need to join WestJet rewards program and provide your WestJet Rewards ID when you book WestJet flights or WestJet vacation packages. Keep in mind that most WestJet dollars no longer expire, but some still will. What is more, if you book for another person, you will not earn WestJet dollars. If all this seems too complicated for you, you may choose from travel rewards credit cards. For example, the Discover it® Miles credit card allows you to earn unlimited 1.5x miles on all purchases. What is more, Discover will match all the miles you've earned at the end of your first year (if you are a new cardmember). For example, if you earn 35,000 miles, you get 70,000 miles. This card comes with no annual fee and no foreign transaction fee.